China Wholesale Automotive Fasteners Manufacturers and Automotive Fasteners Factory

ANSI/ASME B18.2.1 automotive hexagonal flange bolts are designed with a hexagonal head and an integral flange to increase the bearing surface, reduce the compressive stress between the bolt and the connected parts, and improve the stability of the connection. The size range is from 1/4 inch to 6 inches. ANSI/ASME B18.2.1 automotive hexagonal flange bolts are widely used in the automotive industry, especially in the fastening connection of engines, chassis and structural components to ensure high-strength and high-reliability assembly requirements. The bolts are usually made of high-strength alloy steel and heat-treated to meet the automotive industry's strict requirements for mechanical properties, fatigue resistance and corrosion resistance. In addition, its threads comply with the unified thread standards (UNC/UNF), and can provide surface treatments such as galvanizing, electroplating or Dacromet according to different use environments to enhance corrosion resistance and extend service life. Key Advantages for Your Applications: Increased Bearing Surface: The integral flange distributes clamping force over a larger area, reducing stress on connected parts. Improved Connection Stability: The wider bearing surface enhances resistance to loosening, especially under vibration. Simplified Assembly: Eliminates the need for separate washers, reducing part count and assembly time. High Strength and Reliability: Manufactured from high-strength alloy steel and heat-treated to meet stringent automotive industry standards. Excellent Fatigue Resistance: Engineered to withstand the cyclic loading and stresses common in automotive applications. Enhanced Corrosion Resistance: Available with various surface treatments like galvanizing, electroplating, or Dacromet to suit different operating environments and extend service life. Standardized Threads: Compliance with UNC/UNF thread standards ensures compatibility and ease of use. Wide Size Availability: Offers a broad range of sizes to accommodate diverse automotive fastening needs. Ideal for: Engine Assembly: Securing critical engine components such as cylinder heads, manifolds, and brackets. Chassis Fastening: Connecting frame members, suspension components, and body mounts. Structural Components: Joining load-bearing parts of the vehicle body and frame. Transmission Assembly: Fastening housings, covers, and internal components. Axle and Drivetrain Components: Securing hubs, differentials, and related parts. Exhaust Systems: Connecting exhaust manifolds, pipes, and mufflers. Automotive Interiors: Securing seats, dashboards, and trim components where a wider bearing surface is beneficial. Product Name Standard Material Diameter (Shank) Length (Shank) Hexagon Flange Bolt DIN 6921 8.8 Grade Steel, Zinc Plated M6 20 mm Hexagon Flange Bolt DIN 6921 10.9 Grade Steel, Plain M8 25 mm Hexagon Flange Bolt DIN 6921 A2-70 Stainless Steel M10 30 mm Hexagon Flange Bolt DIN 6921 A4-80 Stainless Steel M12 40 mm Hexagon Flange Bolt ISO 4162 8.8 Grade Steel, Hot-Dip Galvanized M16 50 mm Hexagon Flange Bolt ISO 4162 10.9 Grade Steel, Black Oxide M20 60 mm Hexagon Flange Bolt ANSI B18.2.6 ASTM A325, Zinc Plated 1/4" 1" (25.4 mm) Hexagon Flange Bolt ANSI B18.2.6 ASTM A490, Plain 3/8" 1.5" (38.1 mm) Hexagon Flange Bolt ANSI B18.2.6 ASTM F593 (Stainless 304) 1/2" 2" (50.8 mm) Hexagon Flange Bolt JIS B1189 SCM435 Alloy Steel, Zinc Plated M6 20 mm Hexagon Flange Bolt JIS B1189 S45C Carbon Steel, Plain M8 25 mm Hexagon Flange Bolt JIS B1189 SUS316 Stainless Steel M10 30 mm Hexagon Flange Bolt GB/T 5789-2016 8.8 Grade Steel, Electroplated M6 20 mm Hexagon Flange Bolt GB/T 5789-2016 10.9 Grade Steel, Dacromet Coated M8 25 mm Hexagon Flange Bolt ASME B18.2.6 ASTM A193 B7, Zinc Plated 5/8" 3" (76.2 mm) Hexagon Flange Bolt ASME B18.2.6 ASTM A320 L7, Plain 3/4" 4" (101.6 mm) Hexagon Flange Bolt BS EN 14399-4 8.8 Grade Steel, HDG M12 50 mm Hexagon Flange Bolt BS EN 14399-4 10.9 Grade Steel, Plain M20 80 mm

ANSI/ASME B18.2.1 automotive hexagonal bolts comply with the American National Standards Institute (ANSI) and the American Society of Mechanical Engineers (ASME) B18.2.1 standard. The bolts are designed with a standard hexagonal head, have excellent mechanical properties and reliable locking capabilities, and are used in the automotive manufacturing field, including the fastening of engines, chassis systems and structural parts to ensure the safety and stability of vehicle assembly. The bolts are made of high-strength alloy steel and undergo a rigorous heat treatment process to improve tensile strength and fatigue life to meet the automotive industry's requirements for high-load and high-vibration conditions. In addition, its threads comply with the unified thread standard (UNC/UNF), and can provide surface treatments such as galvanizing, electroplating or Dacromet according to different usage environments to enhance corrosion resistance and extend service life. Key Advantages for Your Applications: Compliance with ANSI/ASME B18.2.1 Standards: Ensures dimensional accuracy, material properties, and performance reliability. High-Strength Alloy Steel Construction: Provides exceptional tensile strength and fatigue life for demanding automotive applications. Rigorous Heat Treatment: Enhances durability and resistance to high loads and vibrations. Standard Hexagonal Head: Facilitates easy and secure installation with common tools. Unified Thread Standard (UNC/UNF): Ensures compatibility with existing automotive hardware. Multiple Surface Treatment Options: Offers enhanced corrosion resistance for various operating environments. Ensures Safety and Stability: Provides reliable fastening for critical automotive components. Ideal for: Automotive engine assembly Chassis frame construction Suspension system mounting Steering component fastening Body panel attachment Securing structural members High-stress and high-vibration environments Applications requiring specific corrosion resistance Product Name Standard Material Diameter (Thread Size) Length Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Grade 8.8 M5 16 mm Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Galvanized M6 20 mm Hexagon Head Bolt GB/T 5782-2016 Stainless Steel A2-70 M8 25 mm Hexagon Head Bolt GB/T 5782-2016 Alloy Steel, Grade 10.9 M10 30-100 mm Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Black Oxide M12 40-120 mm Hexagon Head Bolt ASME B18.2.1 ASTM A307, Grade B 1/4" 1" (25.4 mm) Hexagon Head Bolt ASME B18.2.1 ASTM A325, Type 1 5/16" 1.5" (38 mm) Hexagon Head Bolt ASME B18.2.1 ASTM A193 B7 3/8" 2" (50.8 mm) Hexagon Head Bolt ASME B18.2.1 Stainless Steel 316 1/2" 3" (76.2 mm) Hexagon Head Bolt DIN 931 C45 Steel, Galvanized M6 20-200 mm Hexagon Head Bolt DIN 933 8.8 Steel, Plain M8 25-200 mm Hexagon Head Bolt ISO 4014 Steel, Grade 8.8 M10 30-300 mm Hexagon Head Bolt ISO 4017 Stainless Steel A4-80 M12 40-300 mm Hexagon Head Bolt JIS B 1180 SCM435 Alloy Steel M6 20-150 mm Hexagon Head Bolt JIS B 1180 SUS304 Stainless Steel M8 25-150 mm Hexagon Head Bolt ANSI B18.2.3.6M ASTM A490, Galvanized M16 50-300 mm Hexagon Head Bolt BS 3692 EN 14399-4 Grade 10.9 M20 60-300 mm

GB21 small hexagon head bolts are standard fasteners used in automobile manufacturing, mechanical equipment, building structures and other fields. The bolts comply with the GB21 national standard and have excellent mechanical properties and reliable connection strength. Its small hexagon head design can provide higher torque transmission in a limited space while optimizing installation efficiency. GB21 small hexagon head bolts are made of high-strength alloy steel and undergo a heat treatment process to improve wear resistance and tensile strength to meet the high requirements of the automotive industry for fasteners. The surface treatment of the bolts can be galvanized, electrophoresed or other anti-corrosion processes as required to enhance rust resistance and improve durability. In the automotive field, GB21 small hexagon head bolts are often used in key parts such as engine components, chassis connections, suspension systems, etc., providing vehicles with safe and reliable fastening solutions Key Advantages for Your Applications: Standardized Reliability: Complies with the GB21 national standard, ensuring consistent performance. High Mechanical Strength: Manufactured from high-strength alloy steel and heat-treated for exceptional durability. Efficient Torque Transmission: Small hexagon head allows for high torque in limited spaces. Optimized Installation Efficiency: Streamlined head design facilitates faster assembly. Enhanced Wear Resistance: Heat treatment improves the bolt's ability to withstand friction and wear. Customizable Corrosion Protection: Galvanizing, electrophoresis, and other options available. Secure and Reliable Connections: Ensures the integrity and safety of critical assemblies. Ideal for: Engine Components: Securing cylinder heads, manifolds, brackets, and other critical engine parts. Chassis Connections: Joining frame members, crossmembers, and other structural elements. Suspension Systems: Fastening control arms, struts, linkages, and other suspension components. Transmission Assemblies: Securing internal components and housings. Braking Systems: Attaching calipers, rotors, and other braking components. Automotive Interior and Exterior: Securing panels, trim, and other non-structural elements where space is a concern. Mechanical Equipment: General fastening in machinery where space efficiency is required. Building Structures: Certain light-duty structural applications where a smaller head profile is beneficial. Product Name Standard Material Diameter (Thread Size) Length Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Grade 8.8 M5 16 mm Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Galvanized M6 20 mm Hexagon Head Bolt GB/T 5782-2016 Stainless Steel A2-70 M8 25 mm Hexagon Head Bolt GB/T 5782-2016 Alloy Steel, Grade 10.9 M10 30-100 mm Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Black Oxide M12 40-120 mm Hexagon Head Bolt ASME B18.2.1 ASTM A307, Grade B 1/4" 1" (25.4 mm) Hexagon Head Bolt ASME B18.2.1 ASTM A325, Type 1 5/16" 1.5" (38 mm) Hexagon Head Bolt ASME B18.2.1 ASTM A193 B7 3/8" 2" (50.8 mm) Hexagon Head Bolt ASME B18.2.1 Stainless Steel 316 1/2" 3" (76.2 mm) Hexagon Head Bolt DIN 931 C45 Steel, Galvanized M6 20-200 mm Hexagon Head Bolt DIN 933 8.8 Steel, Plain M8 25-200 mm Hexagon Head Bolt ISO 4014 Steel, Grade 8.8 M10 30-300 mm Hexagon Head Bolt ISO 4017 Stainless Steel A4-80 M12 40-300 mm Hexagon Head Bolt JIS B 1180 SCM435 Alloy Steel M6 20-150 mm Hexagon Head Bolt JIS B 1180 SUS304 Stainless Steel M8 25-150 mm Hexagon Head Bolt ANSI B18.2.3.6M ASTM A490, Galvanized M16 50-300 mm Hexagon Head Bolt BS 3692 EN 14399-4 Grade 10.9 M20 60-300 mm

GB5785 Fine Pitch Hexagon Head Bolts are precision-engineered fasteners featuring a hexagonal head and fine thread pitch, optimized for applications requiring high clamping force, vibration resistance, and dimensional accuracy. The fine pitch design (e.g., smaller thread spacing compared to standard coarse threads) allows for finer adjustments and improved load distribution, making these bolts ideal for assemblies subjected to dynamic stresses. Their geometry adheres to strict tolerance standards, ensuring compatibility with threaded holes in high-precision components. In the automotive sector, GB5785 bolts are extensively employed in critical systems such as engine mounts, gearbox housings, and chassis components. The fine threads enhance fatigue resistance under cyclic loads, a common challenge in vehicle operation, while the hex head design enables secure tool engagement for controlled torque application. This is vital in automotive manufacturing, where consistent fastener performance directly impacts safety and longevity. Key Advantages for Your Applications: Exceptional Clamping Force: Ensures secure and robust connections in critical automotive systems. Superior Vibration Resistance: Prevents loosening under the dynamic stresses of vehicle operation. Precise Dimensional Accuracy: Guarantees compatibility with high-precision automotive components. Enhanced Fatigue Resistance: The fine thread design improves the lifespan of the joint under cyclic loads. Secure Tool Engagement: The hex head allows for controlled torque application, vital for safety-critical assemblies. Finer Adjustment Capability: Enables precise tightening and optimal clamping force. Improved Load Distribution: Enhances the overall strength and reliability of the fastened joint. Ideal for: Engine Mounts: Providing secure and vibration-resistant fastening for engine assemblies. Gearbox Housings: Ensuring tight and reliable sealing and structural integrity. Chassis Components: Securing critical suspension, steering, and structural elements. High-Precision Automotive Assemblies: Where dimensional accuracy and precise torque are paramount. Applications Subject to Cyclic Loads: Enhancing fatigue resistance in dynamically stressed joints. Automotive Manufacturing Assembly Lines: Ensuring consistent and reliable fastening for safety-critical components. Heavy-Duty Automotive Applications: Requiring high clamping force and resistance to loosening. Product Name Standard Material Diameter (Thread Size) Length Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Grade 8.8 M5 16 mm Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Galvanized M6 20 mm Hexagon Head Bolt GB/T 5782-2016 Stainless Steel A2-70 M8 25 mm Hexagon Head Bolt GB/T 5782-2016 Alloy Steel, Grade 10.9 M10 30-100 mm Hexagon Head Bolt GB/T 5782-2016 Carbon Steel, Black Oxide M12 40-120 mm Hexagon Head Bolt ASME B18.2.1 ASTM A307, Grade B 1/4" 1" (25.4 mm) Hexagon Head Bolt ASME B18.2.1 ASTM A325, Type 1 5/16" 1.5" (38 mm) Hexagon Head Bolt ASME B18.2.1 ASTM A193 B7 3/8" 2" (50.8 mm) Hexagon Head Bolt ASME B18.2.1 Stainless Steel 316 1/2" 3" (76.2 mm) Hexagon Head Bolt DIN 931 C45 Steel, Galvanized M6 20-200 mm Hexagon Head Bolt DIN 933 8.8 Steel, Plain M8 25-200 mm Hexagon Head Bolt ISO 4014 Steel, Grade 8.8 M10 30-300 mm Hexagon Head Bolt ISO 4017 Stainless Steel A4-80 M12 40-300 mm Hexagon Head Bolt JIS B 1180 SCM435 Alloy Steel M6 20-150 mm Hexagon Head Bolt JIS B 1180 SUS304 Stainless Steel M8 25-150 mm Hexagon Head Bolt ANSI B18.2.3.6M ASTM A490, Galvanized M16 50-300 mm Hexagon Head Bolt BS 3692 EN 14399-4 Grade 10.9 M20 60-300 mm

ANSI/ASME B18.2.1 Square Head Bolts are standardized fasteners distinguished by their square-shaped heads, designed for applications requiring robust torque transmission and secure mechanical engagement. The square head geometry provides a larger contact surface for wrench or spanner tools, enabling higher torque application with reduced risk of rounding compared to hexagonal heads. These bolts typically feature coarse or fine threads, depending on the specification, and are manufactured to meet ANSI/ASME B18.2.1 dimensional and mechanical requirements, ensuring interchangeability and reliability in industrial settings. Square Head Bolts are often utilized in legacy or specialized vehicle systems where their design aligns with historical engineering practices. For example, they may be found in vintage vehicle restorations, heavy-duty truck chassis assemblies, or certain suspension components where the square head's resistance to slippage under high torque is advantageous. While less common in modern automotive mass production due to the prevalence of hexagonal heads for automated assembly, they remain relevant in niche scenarios requiring manual maintenance or compatibility with older designs. ANSI/ASME B18.2.1 Square Head Bolts: Robust Torque and Secure Engagement for Specialized Applications Introducing the Strength and Reliability of ANSI/ASME B18.2.1 Square Head Bolts. At [Your Company Name - e.g., Zhejiang Zhongrui Auto Parts], we recognize the importance of having the right fastener for every application, especially in specialized and demanding environments. Our ANSI/ASME B18.2.1 Square Head Bolts are engineered for robust torque transmission and secure mechanical engagement, making them a reliable choice for a variety of industrial and niche automotive needs. Engineered for High Torque and Secure Grip: The defining feature of these standardized fasteners is their distinct square-shaped head. This geometry provides a significantly larger contact surface area for wrenches or spanners compared to traditional hexagonal heads. This increased contact allows for the application of higher torque levels with a reduced risk of the tool slipping or rounding the bolt head, ensuring a secure and reliable fastening. Designed for Ease of Use (in Specific Contexts): While less prevalent in modern automated automotive assembly, the design of Square Head Bolts offers specific advantages in certain scenarios: Enhanced Manual Torque Application: The square head provides a robust grip for manual wrenching, particularly beneficial in maintenance and repair settings where high torque is required. Compatibility with Older Tooling: In legacy systems and vintage vehicle restoration, square head bolts are often the standard, ensuring compatibility with existing tool sets. Resistance to Rotation During Tightening: The four distinct corners of the square head offer increased resistance to unintentional rotation while the nut is being tightened, simplifying single-wrench installation in some applications. Key Advantages for Your Applications: Robust Torque Transmission: Square head design allows for higher torque application without slippage. Secure Mechanical Engagement: Provides a solid and reliable connection. Compatibility with Legacy Systems: Ideal for maintaining and restoring older equipment and vehicles. Resistance to Rounding: The larger contact area minimizes the risk of damaging the bolt head during tightening. Durable Construction: Manufactured to meet stringent ANSI/ASME B18.2.1 dimensional and mechanical requirements. Interchangeability and Reliability: Ensures consistent performance and ease of replacement in industrial settings. Available in Coarse and Fine Threads: Offers flexibility to suit various application requirements based on the ANSI/ASME B18.2.1 specification. Ideal for: Vintage Vehicle Restoration: Maintaining the authentic design and functionality of classic automobiles. Heavy-Duty Truck Chassis Assemblies: Providing robust and reliable fastening for critical structural components. Specialized Vehicle Systems: Applications where the square head's torque resistance is advantageous (e.g., certain suspension components, agricultural equipment). Legacy Industrial Equipment: Ensuring compatibility with existing machinery and maintenance procedures. Manual Maintenance and Repair: Providing a secure grip for high-torque manual wrenching. Applications Requiring Resistance to Rotation During Tightening: Simplifying assembly in specific scenarios. Product Name Standard Material Diameter (Shank) Length Square Head Bolt GB/T 5780-2016 Carbon Steel, Galvanized M6 (6 mm) 20 mm Square Head Bolt GB/T 5780-2016 Carbon Steel, Galvanized M8 (8 mm) 30 mm Square Head Bolt GB/T 5780-2016 Carbon Steel, Galvanized M10 (10 mm) 40 mm Square Head Bolt GB/T 5780-2016 Carbon Steel, Galvanized M12 (12 mm) 50 mm Square Head Bolt GB/T 5780-2016 Carbon Steel, Galvanized M16 (16 mm) 80 mm Square Head Bolt ASME B18.2.1 ASTM A307, Grade A 1/4" (6.35 mm) 1" (25.4 mm) Square Head Bolt ASME B18.2.1 ASTM A307, Grade A 3/8" (9.53 mm) 1.5" (38 mm) Square Head Bolt ASME B18.2.1 ASTM A307, Grade A 1/2" (12.7 mm) 2" (50.8 mm) Square Head Bolt ASME B18.2.1 ASTM A307, Grade A 5/8" (15.9 mm) 3" (76.2 mm) Square Head Bolt ASME B18.2.1 ASTM A307, Grade A 3/4" (19.05 mm) 4" (101.6 mm) Square Head Bolt DIN 603 8.8 Steel, Zinc Plated M8 (8 mm) 30 mm Square Head Bolt DIN 603 8.8 Steel, Zinc Plated M10 (10 mm) 40 mm Square Head Bolt DIN 603 8.8 Steel, Zinc Plated M12 (12 mm) 50 mm Square Head Bolt DIN 603 8.8 Steel, Zinc Plated M16 (16 mm) 80 mm Square Head Bolt ISO 4016 A4-80 Stainless Steel M6 (6 mm) 20 mm Square Head Bolt ISO 4016 A4-80 Stainless Steel M8 (8 mm) 30 mm Square Head Bolt ISO 4016 A4-80 Stainless Steel M10 (10 mm) 40 mm Square Head Bolt ANSI B18.5 SAE J429, Grade 5 1/2" (12.7 mm) 2" (50.8 mm) Square Head Bolt ANSI B18.5 SAE J429, Grade 5 3/4" (19.05 mm) 3" (76.2 mm) Square Head Bolt JIS B1180 SCM435 Alloy Steel M10 (10 mm) 40 mm Square Head Bolt JIS B1180 SCM435 Alloy Steel M12 (12 mm) 50 mm

ANSI/ASME B18.5 Round Head Square Neck Bolts combining a smooth, rounded head with a square neck to prevent rotation during installation. This unique design ensures secure seating in square-shaped recesses or mating components, eliminating slippage even under extreme torque. Manufactured to ANSI/ASME B18.5 standards, these bolts deliver consistent dimensions and mechanical properties, making them ideal for assemblies requiring both aesthetic smoothness and anti-rotational stability. In automotive engineering, ANSI/ASME B18.5 bolts are commonly used in components exposed to high vibration and torsional stress. Their square neck feature is particularly advantageous in drivetrain systems, axle housings, and heavy-duty suspension linkages, where rotational resistance is critical to maintaining structural integrity. The rounded head design also reduces protrusion risks, making them suitable for automotive applications requiring streamlined profiles, such as underbody panels or transmission mounts. Key Advantages for Your Applications: Positive Anti-Rotation: The square neck design effectively prevents bolt rotation, ensuring joint integrity under high torque and vibration. Aesthetic Smoothness: The rounded head provides a clean and streamlined appearance, suitable for visible automotive components. Consistent Dimensions & Properties: Manufactured to ANSI/ASME B18.5 standards, guaranteeing dimensional accuracy and reliable mechanical performance. Enhanced Structural Integrity: Prevents loosening and maintains the clamping force of critical automotive joints. Reduced Assembly Time: The self-locking feature can simplify the assembly process by eliminating the need for additional anti-rotation hardware. Minimized Damage Risk: The rounded head reduces the potential for snagging or damage to surrounding components. Ideal for: Drivetrain Systems: Securing components where high torsional stress and vibration are present, such as transmission mounts and axle housings. Heavy-Duty Suspension Linkages: Providing reliable, non-rotating connections in critical suspension components. Underbody Panels: Offering a low-profile, secure fastening solution that minimizes protrusion. Transmission Mounts: Ensuring stable and vibration-resistant mounting of the transmission. Seating Assemblies: Providing secure and aesthetically pleasing fastening for seat frames and mechanisms. Body Panels: Securing panels where a smooth exterior finish is desired along with robust fastening. Agricultural and Construction Equipment: Applications requiring resistance to rotation in demanding environments. Product Name Standard Material & Finish Diameter (Shank) Length (Shank) Round Head Square Neck Bolt ASTM A449 Grade 5 Carbon Steel, Zinc Plated 1/2" (12.7mm) 2" (50.8mm) Round Head Square Neck Bolt ASTM A449 Grade 8 Alloy Steel, Hot-Dip Galv 5/8" (16mm) 3" (76.2mm) Round Head Square Neck Bolt ASTM A449 AISI 304 Stainless Steel, Plain 3/4" (19.05mm) 4" (101.6mm) Round Head Square Neck Bolt DIN 603 8.8 Steel, Zinc Flake Coated M12 40mm Round Head Square Neck Bolt DIN 603 10.9 Steel, Dacromet Coated M16 60mm Round Head Square Neck Bolt DIN 603 A2-70 Stainless Steel M20 80mm Round Head Square Neck Bolt ISO 7412 Class 8.8 Steel, Electrogalvanized M24 100mm Round Head Square Neck Bolt ISO 7412 Class 10.9 Steel, Phosphated M30 120mm Round Head Square Neck Bolt GB/T 1228 40Cr Steel, Hot-Dip Galvanized M36 150mm Round Head Square Neck Bolt ASME B18.5 ASTM A325 Type 1, Plain 1" (25.4mm) 6" (152.4mm) Round Head Square Neck Bolt ASME B18.5 ASTM A490, Xylan Coated 1-1/4" (31.75mm) 8" (203.2mm) Round Head Square Neck Bolt JIS B1180 SCM435 Alloy Steel, Zinc Plated M10 30mm Round Head Square Neck Bolt JIS B1180 SUS316 Stainless Steel M14 50mm Round Head Square Neck Bolt BS 3692 Grade 8.8 Steel, Geomet Coated M18 70mm Round Head Square Neck Bolt SAE J429 Grade 2 Steel, Plain 7/16" (11.11mm) 1-1/2" (38.1mm) Round Head Square Neck Bolt SAE J429 Grade 5 Steel, Zinc-Nickel 3/4" (19.05mm) 5" (127mm)

Passenger Car Wheel Boltss are used to securely attach the wheel to the vehicle's hub assembly. Bolts withstand dynamic loads, vibrations and harsh driving conditions, ensuring the structural integrity of the wheel-to-axle connection. In the automotive industry, wheel hub bolts are manufactured from high-strength materials such as carbon steel or alloy steel, are subjected to strict tolerance control, and are often equipped with anti-corrosion coatings such as zinc plating for enhanced durability. Their precise thread design and torque specifications are essential to maintain wheel alignment and prevent accidents caused by stress loosening. Automotive wheel bolts meet international standards such as ISO 10101 or DIN 74361 to ensure their reliability. These parts are vehicle-specific, with thread pitch, length and seat type (such as tapered, spherical or flat seat) customized to original factory requirements. Our automotive wheel hub bolts combine precision engineering with strict quality control to ensure optimal load distribution and long-term performance. Whether used for replacement or upgrade, these bolts are certified and tested for tensile strength and fatigue. Designed for Ease of Use: Our Passenger Car Wheel Bolts are designed with the installer in mind, featuring: Optimized Thread Design: Facilitates smooth and efficient tightening. Clearly Defined Head: Provides a secure grip for standard wrenches. Consistent Dimensions: Ensures accurate torque application and proper wheel seating. Corrosion-Resistant Coating: Simplifies maintenance and extends the bolt's lifespan. Key Advantages for Your Applications: Ensures Secure Wheel Attachment: Critical for passenger safety and vehicle stability. Withstands Dynamic Loads and Vibrations: Engineered for long-term durability under demanding conditions. Meets Stringent International Standards: Guarantees reliability and performance. Vehicle-Specific Designs: Ensures perfect fitment for various makes and models. Enhanced Corrosion Resistance: Extends the lifespan of the bolts. Maintains Proper Wheel Alignment: Prevents stress loosening and ensures a safe driving experience. Certified and Tested: Undergoes rigorous testing for tensile strength and fatigue resistance. Designed for Ease of Installation: Simplifies wheel mounting and maintenance procedures. Ideal for: Routine wheel replacement and tire changes. Upgrading wheel styles or sizes. Automotive repair and maintenance services. Vehicle customization projects. Ensuring compliance with safety regulations. Product Name Standard Material Diameter Length Passenger Car Wheel Bolts ISO 7412 Class 10.9 Alloy Steel M12 x 1.25 35 mm Passenger Car Wheel Bolts ISO 7412 Class 10.9 Alloy Steel M14 x 1.5 45 mm Passenger Car Wheel Bolts ISO 7412 Class 10.9 Alloy Steel M14 x 1.5 55 mm Passenger Car Wheel Bolts ISO 7412 Class 10.9 Alloy Steel M16 x 1.5 60 mm Passenger Car Wheel Bolts DIN 74361 Class 12.9 Steel, Zinc-Nickel Plated M12 x 1.5 28 mm Passenger Car Wheel Bolts DIN 74361 Class 12.9 Steel, Zinc-Nickel Plated M14 x 1.5 40 mm Passenger Car Wheel Bolts DIN 74361 Class 12.9 Steel, Zinc-Nickel Plated M14 x 1.5 50 mm Passenger Car Wheel Bolts ANSI B18.2.1 Grade 8 Steel, Dacromet Coated 1/2"-20 UNF 1.5" (38 mm) Passenger Car Wheel Bolts ANSI B18.2.1 Grade 8 Steel, Dacromet Coated 9/16"-18 UNF 1.75" (44 mm) Passenger Car Wheel Bolts JIS D4211 SCr440 Alloy Steel, Zinc Plated M12 x 1.25 30 mm Passenger Car Wheel Bolts JIS D4211 SCr440 Alloy Steel, Zinc Plated M14 x 1.5 42 mm Passenger Car Wheel Bolts SAE J429 Grade 5 Steel, Chrome Plated 7/16"-20 UNF 1.25" (32 mm) Passenger Car Wheel Bolts SAE J429 Grade 5 Steel, Chrome Plated 1/2"-20 UNF 1.5" (38 mm)

The GB4231 U-Bolt is a standardized fastener compliant with China's national specifications, engineered to secure cylindrical or tubular components in demanding environments. Widely used in automotive systems, such as heavy-duty truck chassis and commercial vehicle suspension systems, its U-shaped design ensures robust clamping force to withstand vibrations, shocks, and dynamic loads. Constructed from carbon steel or alloy steel, it undergoes surface treatments like zinc plating or Dacromet coating to resist corrosion and abrasion, making it ideal for harsh conditions like salt spray or humidity. The GB4231 U-Bolt features calibrated threading and a radius-optimized U-bend, minimizing stress concentration and metal fatigue—critical for automotive parts exposed to constant motion. In commercial vehicles, it is integral to fixing rear axle leaf springs, directly impacting load-bearing safety and stability. Standardized dimensions ensure compatibility with OEM components, while customizable options (diameter, length, coating) address specialized automotive aftermarket needs. Designed for Ease of Use: Our GB4231 U-Bolts are engineered for straightforward and efficient integration into your assembly processes: Standardized Dimensions: Compliance with national GB4231 specifications ensures seamless compatibility with Original Equipment Manufacturer (OEM) components, simplifying installation and maintenance. Calibrated Threading: Precision-engineered threads allow for consistent and accurate tightening, ensuring optimal clamping force and joint integrity. Optimized U-Bend Radius: The carefully designed U-bend facilitates easy alignment and installation around cylindrical or tubular components, minimizing installation complexities. Readily Available: Stocked in standard sizes to meet immediate demands for common applications. Key Advantages for Your Applications: Robust Clamping Force: U-shaped design provides secure fastening against vibration and shock. Exceptional Corrosion Resistance: Zinc plating and Dacromet coating ensure longevity in harsh environments. Minimized Stress Concentration: Radius-optimized U-bend reduces metal fatigue for enhanced durability. Guaranteed OEM Compatibility: Standardized dimensions ensure seamless integration with existing systems. Customizable Options: Available in various diameters, lengths, and coatings to meet specialized aftermarket needs. Enhanced Safety and Stability: Critical for securing load-bearing components in commercial vehicles. Long-Term Reliability: Engineered for consistent performance and extended service life. Ideal for: Heavy-duty truck chassis systems Commercial vehicle suspension systems (leaf spring mounting) Securing exhaust systems and pipes Industrial machinery and equipment Agricultural vehicles Marine applications Any application requiring robust clamping of cylindrical or tubular components Product name Standard Material Diameter Length U - Bolt JB/ZQ 4321—97 Steel (not specified in detail in ref2, can be various types as per common use) M6 - M64 Length is not strictly fixed, can be various values as per needs 2 (for reference, as it's mentioned for marking in search results) Zinc - Plated (for surface - treated ones as per marking example in ref2) 1/4〃 - 2 - 1/2〃 2 U - Bolt No specific standard mentioned in ref4 (general market - based) 304 Stainless steel 4 M4, M5, M6, M8, M10, M12 4 14mm, 16mm, 18mm, 22mm, 25mm, 27mm, 32mm, 33mm, 38mm, 40mm, 42mm, 45mm, 48mm, 50mm, 51mm, 57mm, 60mm, 62mm, 63mm, 75mm, 76mm, 78mm, 89mm, 90mm, 100mm, 102mm, 108mm, 114mm, 120mm, 130mm, 133mm, 140mm, 150mm, 159mm, 168mm, 219mm 4 U - Bolt DIN3570 (mentioned in ref7) Stainless Steel (303, 304, 316, 201), Carbon Steel (35 #, 45 #), Galvanized, Aluminum Alloy, Copper, Carbon Steel etc. 7 M4 - M36 Not specified in detail in ref7 for specific length values 1/4" - 3" 7

The 7-Shaped Anchor Bolt, characterized by its angular bend resembling the numeral "7," is a heavy-duty fastener designed to embed securely into concrete or masonry. Widely utilized in automotive facilities, it anchors machinery, assembly line equipment, and structural supports to withstand high static and dynamic loads. Crafted from high-grade carbon steel or alloy steel, it undergoes hot-dip galvanizing or epoxy coating to resist corrosion, ensuring longevity in industrial environments such as automotive workshops or testing labs. This bolt’s unique geometry optimizes pull-out resistance, with the bent section acting as a mechanical lock within the base material. Threaded ends allow adjustable tensioning, critical for aligning automotive manufacturing equipment or securing vibration-prone systems. Compliance with standards like ISO 1461 or ASTM F1554 ensures reliability, while customizable lengths and diameters cater to specific automotive infrastructure projects, from floor-mounted robotics to overhead conveyor installations. Key Advantages for Your Applications: Unwavering Anchorage: The unique 7-shaped bend acts as a robust mechanical interlock within the concrete or masonry, providing exceptional pull-out resistance against high static and dynamic loads prevalent in automotive facilities. Heavy-Duty Performance: Crafted from high-grade carbon steel or alloy steel to withstand the demanding forces of anchored machinery and equipment. Superior Corrosion Resistance: Undergoes rigorous hot-dip galvanizing (compliant with ISO 1461 or equivalent) or durable epoxy coating, ensuring long-term reliability in industrial environments such as automotive workshops and testing labs where exposure to moisture and chemicals is common. Precise Alignment Capabilities: The threaded ends allow for fine-tuned tensioning, essential for the accurate alignment of automotive manufacturing equipment, including robotic arms and assembly line components. Enhanced Stability for Vibration-Prone Systems: Securely anchors systems susceptible to vibration, such as testing equipment and heavy machinery, minimizing movement and ensuring operational integrity. Compliance with Industry Standards: Manufactured in adherence to recognized standards like ISO 1461 or ASTM F1554, guaranteeing consistent quality and performance you can trust. Customizable Solutions: Available in a wide range of customizable lengths and diameters to precisely match the requirements of specific automotive infrastructure projects, from securing floor-mounted robotics to installing overhead conveyor systems. Ideal for: Securing Heavy Machinery: Providing a stable foundation for large-scale automotive manufacturing equipment, including stamping presses and welding robots. Anchoring Assembly Line Equipment: Ensuring the fixed positioning of conveyors, automated guided vehicles (AGVs), and other critical assembly line components. Stabilizing Structural Supports: Firmly anchoring steel columns, beams, and other structural elements within automotive plant buildings. Mounting Testing and Calibration Equipment: Providing a vibration-resistant base for sensitive automotive testing and calibration instruments. Fixing Safety Barriers and Guardrails: Securely anchoring safety infrastructure within automotive production areas. Installing Overhead Systems: Supporting the weight and movement of overhead cranes, lighting fixtures, and ventilation systems. Foundation Bolting for Automotive Plant Expansions: Providing reliable anchor points for new construction and infrastructure upgrades. Product Name Standard Material Diameter Length Anchor Bolt IS 5624-1970 Carbon Steel, Galvanized 8 mm - 72 mm 50 mm - 500 mm Anchor Bolt DIN 3570 Stainless Steel (304/316) M4 - M36 30 mm - 300 mm Anchor Bolt GB/T 799-2020 45# Carbon Steel M10 - M64 100 mm - 600 mm Expansion Anchor Bolt ANSI B18.2.1 ASTM A307, Zinc Plated 1/4" - 2-1/2" 1.5" - 12" Sleeve Anchor Bolt ASME B18.6.3 SAE J429, Hot-Dip Galvanized 3/16" - 3/4" 2" - 8" Wedge Anchor Bolt ISO 898-1 AISI 304 Stainless Steel M6 - M30 50 mm - 300 mm Chemical Anchor Bolt JIS B 1051 SCM440 Alloy Steel M8 - M24 80 mm - 200 mm Hilti Anchor Bolt Proprietary High-Strength Steel M8x60 - M20x200 60 mm - 200 mm Shark Fin Sleeve Anchor Proprietary Carbon Steel, Electroplated 12 mm (1/2") 95 mm - 140 mm Hook Anchor Bolt DIN 580 Galvanized Steel M6 - M16 40 mm - 150 mm

The ANSI/ASME B18.16.4 Automotive Hexagon Flange Nut is a robust fastening solution engineered to meet the rigorous demands of automotive applications. Designed with a wide flange base, it distributes clamping force evenly across mating surfaces, minimizing the risk of loosening under vibration—a critical feature in dynamic automotive environments. Its hexagonal shape ensures compatibility with standard tools, streamlining assembly and maintenance processes, while the precision-machined threads guarantee secure, backlash-free engagement with bolts. Ideal for high-stress components like chassis systems, suspension assemblies, and brake calipers, this nut combines high tensile strength with corrosion-resistant finishes (such as zinc plating or Dacromet coating) to withstand harsh road conditions and temperature fluctuations. Automotive engineers rely on its reliability for critical connections in transmissions, exhaust systems, and wheel hubs, where consistent performance directly impacts safety and durability. By adhering to strict ANSI/ASME dimensional and material standards, the B18.16.4 ensures seamless integration with existing designs, reducing downtime and enhancing operational efficiency. For manufacturers seeking a trusted, cost-effective fastener that balances strength, precision, and longevity, this hex flange nut stands as a cornerstone of automotive assembly excellence. Designed for Ease of Use: We recognize that efficiency on the assembly line and during maintenance is paramount. The standard hexagonal shape of this nut ensures seamless compatibility with a wide range of commonly used tools, simplifying and accelerating both assembly and subsequent maintenance procedures. Furthermore, the precision-machined threads guarantee a secure and backlash-free engagement with corresponding bolts, contributing to the overall stability and integrity of the fastened joint. This precise threading eliminates play and ensures consistent torque application, vital for the longevity of critical connections. Key Advantages for Your Applications: Enhanced Resistance to Loosening: The wide flange base evenly distributes clamping force, significantly reducing the risk of vibration-induced loosening – a critical safety feature in automotive environments. Simplified Assembly & Maintenance: The standard hexagonal head ensures compatibility with common tools, streamlining both initial assembly and future maintenance tasks, saving time and resources. Secure & Backlash-Free Engagement: Precision-machined threads guarantee a tight and stable connection with bolts, eliminating unwanted movement and ensuring long-term reliability. Optimal Clamping Force Distribution: The integrated flange provides a larger bearing surface, preventing damage to softer materials and ensuring consistent preload across the joint. High Tensile Strength: Manufactured from robust materials to withstand significant mechanical loads, ensuring the integrity of critical automotive connections. Superior Corrosion Resistance: Available with various protective finishes, including zinc plating and Dacromet coating, to effectively combat harsh road conditions, moisture, chemicals, and extreme temperature fluctuations, extending the lifespan of the fastener and the assembly. Adherence to Strict Standards: Manufactured in compliance with ANSI/ASME B18.16.4 dimensional and material specifications, guaranteeing seamless integration with existing automotive designs and ensuring consistent performance across applications. Cost-Effective Reliability: Offers a dependable and long-lasting fastening solution, minimizing the need for replacements and reducing overall lifecycle costs. Ensures Seamless Integration: Adherence to industry-standard dimensions allows for easy interchangeability and integration into existing automotive designs, minimizing downtime during assembly or repair. Contributes to Operational Efficiency: Reliable and secure fastening reduces the likelihood of failures and the associated downtime, enhancing overall operational efficiency in automotive manufacturing and maintenance. Ideal for: High-Stress Automotive Components: Specifically engineered for critical connections demanding exceptional strength and resistance to loosening. Chassis Systems: Ensures the structural integrity and stability of the vehicle's frame under various driving conditions. Suspension Assemblies: Provides secure and reliable connections for components crucial to vehicle handling and ride comfort. Brake Calipers: Guarantees the secure mounting of vital braking components, directly impacting vehicle safety. Transmissions: Facilitates the robust assembly of internal components, ensuring smooth and reliable power transfer. Exhaust Systems: Withstands high temperatures and corrosive environments, ensuring a secure and leak-free connection. Wheel Hubs: Provides a reliable and durable fastening solution for securing wheels, a critical safety component. Engine Components: Suitable for various engine assembly applications requiring strong and vibration-resistant fasteners. Steering Systems: Ensures the secure connection of components vital for vehicle control and driver safety. Body Structures: Contributes to the overall rigidity and safety of the vehicle's body. Product Name Standard Material Diameter (Metric) Diameter (Imperial) Length/Height (Metric) Hexagon Flange Nut GB/T 6177-1986 Carbon Steel, Galvanized M6 - M36 1/4" - 1-1/2" 5 mm - 28 mm Hexagon Flange Nut GB/T 6187-1986 All-Metal, Zinc Plated M8 - M24 5/16" - 1" 6.5 mm - 22 mm Hexagon Flange Nut GB/T 9125.1-2020 Carbon Steel M39 - M64 1-1/2" - 2-1/2" 30 mm - 55 mm Hexagon Flange Nut DIN 3570 Stainless Steel (304/316) M4 - M36 1/8" - 1-1/2" 3 mm - 28 mm Hexagon Flange Nut ISO 8434-1-2007 Alloy Steel (24° Cone Connectors) M10 - M22 3/8" - 7/8" 12 mm - 35 mm Hexagon Flange Nut ANSI B18.6.3 ASTM A228, Zinc Plated #6 - 3/4" 0.138" - 0.75" 3.5 mm - 19 mm Hexagon Flange Nut DIN 74305-2-1994 Stainless Steel M10 - M16 3/8" - 5/8" 14 mm - 25 mm Hexagon Flange Nut JB/T 2775-1992 Carbon Steel (PN16-PN32MPa) M12 - M48 1/2" - 1-7/8" 18 mm - 50 mm Hexagon Flange Nut NB/T 47027-2012 Alloy Steel (Pressure Vessels) M24 - M64 1" - 2-1/2" 30 mm - 60 mm Hexagon Flange Nut HB 8122-2002 Titanium Alloy (Aerospace) M6 - M20 1/4" - 3/4" 8 mm - 25 mm

The GB6177.2 Fine Pitch Hexagonal Flange Nut is a precision-engineered fastener tailored for the demanding requirements of automotive systems, combining reliability with advanced design. Featuring a fine-pitch thread profile, it delivers enhanced clamping precision and resistance to loosening in high-vibration environments, making it ideal for critical automotive components such as engine mounts, transmission systems, and steering assemblies. The integrated flange base distributes load evenly, reducing stress concentration on mating surfaces while eliminating the need for separate washers—streamlining assembly and lowering production costs. Manufactured to China’s GB standards, this nut ensures strict dimensional accuracy and material consistency, with options for electro-galvanized or phosphate coatings to combat corrosion from road salts, moisture, and temperature extremes. Its hexagonal head allows seamless integration with standard tools, accelerating maintenance workflows without compromising torque performance. Engineers trust GB6177.2 for applications requiring micrometer-level adjustments, such as brake line fittings or sensor mounts, where precision directly impacts vehicle safety and efficiency. By balancing high tensile strength, anti-fatigue properties, and cost-effectiveness, this fine-pitch flange nut empowers automotive manufacturers to achieve robust, long-lasting assemblies while adhering to rigorous quality benchmarks. For projects demanding accuracy, durability, and compliance with domestic standards, GB6177.2 is the definitive choice for modern automotive engineering. Expanding on "Designed for Ease of Use," "Key Advantages," and "Ideal for" for GB6177.2 Fine Pitch Hexagonal Flange Nut: Designed for Ease of Use: Streamlining Your Assembly Processes The GB6177.2 Fine Pitch Hexagonal Flange Nut is meticulously engineered with ease of integration in mind, directly addressing the demands of high-volume automotive production. Its hexagonal head ensures seamless compatibility with standard automotive tools, allowing for rapid and efficient tightening and loosening during assembly and maintenance. This familiar interface minimizes the need for specialized equipment, contributing to faster production cycles and reduced labor costs. Furthermore, the innovative integrated flange design eliminates the often time-consuming step of separately installing washers. By combining the nut and washer functions into a single, robust component, the GB6177.2 simplifies the assembly process, reduces the number of parts to handle, and minimizes the risk of incorrect washer selection or orientation – ultimately leading to more efficient and error-free manufacturing. This user-centric design translates to tangible benefits on the assembly line, contributing to smoother workflows and improved overall productivity. Key Advantages for Your Applications: Enhanced Clamping Precision: The fine-pitch thread profile allows for more precise torque application and finer adjustments, crucial for sensitive automotive components. Superior Resistance to Loosening: Engineered to withstand high-vibration environments prevalent in vehicles, ensuring long-term assembly integrity and reducing the risk of component failure. Integrated Load Distribution: The built-in flange evenly distributes clamping force across the mating surface, minimizing stress concentration and preventing damage or deformation. Eliminates Separate Washers: Simplifies assembly, reduces part count, lowers procurement costs, and minimizes the potential for assembly errors. Standard Tool Compatibility: The hexagonal head integrates seamlessly with common automotive tools, facilitating efficient assembly and maintenance. High Dimensional Accuracy: Manufactured to stringent GB standards, guaranteeing consistent and reliable performance across all units. Material Consistency: Ensures predictable mechanical properties and long service life in demanding automotive applications. Corrosion Resistance Options: Available with electro-galvanized or phosphate coatings providing robust protection against rust and degradation from harsh environmental factors. Optimized for Critical Components: Specifically tailored for use in engine mounts, transmission systems, steering assemblies, brake line fittings, and sensor mounts where reliability is paramount. Facilitates Micrometer-Level Adjustments: The fine thread pitch enables precise adjustments required for critical fittings and sensor placements, directly impacting vehicle safety and efficiency. Balances Strength and Cost-Effectiveness: Delivers high tensile strength and anti-fatigue properties without compromising on cost-efficiency, offering a superior value proposition. Ensures Long-Lasting Assemblies: Robust design and material selection contribute to the creation of durable and reliable automotive systems. Complies with Domestic Standards: Manufactured to China’s GB standards, ensuring adherence to relevant quality and safety benchmarks. Reduces Assembly Time and Costs: The integrated flange and standard tool compatibility streamline the assembly process, leading to significant time and cost savings. Improves Overall Assembly Reliability: Fewer parts and simplified installation procedures minimize the potential for errors and contribute to more consistent and reliable assemblies. Ideal for: Critical Engine Mounts: Providing secure and vibration-resistant fastening for engine stability and reduced noise and vibration. Transmission System Assemblies: Ensuring the integrity of complex transmission components under high torque and dynamic loads. Steering System Components: Offering precise and reliable fastening for responsive and safe steering mechanisms. Brake Line Fittings: Enabling accurate and leak-proof connections crucial for vehicle braking performance and safety. Sensor Mounts: Providing precise and stable mounting for sensitive automotive sensors, ensuring accurate data collection and system functionality. High-Vibration Environments: Applications throughout the vehicle where resistance to loosening is essential for long-term reliability. Automotive Assembly Lines: Where speed, efficiency, and ease of use are critical for meeting production targets. Maintenance and Repair Operations: The standard hexagonal head allows for quick and straightforward removal and reinstallation. Applications Requiring Precise Preload: The fine thread pitch allows for accurate torque control and the achievement of optimal clamping force. Automotive Manufacturers Seeking Cost-Effective Solutions: The integrated flange reduces part count and streamlines assembly, contributing to overall cost savings. Projects Demanding GB Standard Compliance: Ensuring adherence to China’s national quality and safety regulations. Modern Automotive Engineering: Where precision, durability, and efficient assembly are paramount for vehicle performance and longevity. Electric Vehicle (EV) Component Assembly: Suitable for various fastening points within EV powertrains and chassis systems. Hybrid Vehicle (HV) Component Assembly: Meeting the specific fastening needs of hybrid drivetrain and electronic systems. Automotive Tier 1 Suppliers: Providing reliable and high-quality fasteners for integration into larger automotive modules and systems. Product Name Standard Material Diameter Length Fine Pitch Hexagonal Flange Nut GB/T 6177.1 - 2016 Carbon Steel, Zinc Plated M5 x 0.8 5 mm Fine Pitch Hexagonal Flange Nut GB/T 6177.1 - 2016 Carbon Steel, Zinc Plated M6 x 1 6 mm Fine Pitch Hexagonal Flange Nut GB/T 6177.1 - 2016 Carbon Steel, Zinc Plated M8 x 1.25 8 mm Fine Pitch Hexagonal Flange Nut GB/T 6177.1 - 2016 Carbon Steel, Zinc Plated M10 x 1.5 10 mm Fine Pitch Hexagonal Flange Nut GB/T 6177.1 - 2016 Carbon Steel, Zinc Plated M12 x 1.75 12 mm Fine Pitch Hexagonal Flange Nut GB/T 6177.1 - 2016 Carbon Steel, Zinc Plated M14 x 2 14 mm Fine Pitch Hexagonal Flange Nut ANSI B18.16.4 - 2018 ASTM A563 Grade C, Zinc Plated 1/4 - 20 UNF 0.25" Fine Pitch Hexagonal Flange Nut ANSI B18.16.4 - 2018 ASTM A563 Grade C, Zinc Plated 5/16 - 18 UNF 0.3125" Fine Pitch Hexagonal Flange Nut ANSI B18.16.4 - 2018 ASTM A563 Grade C, Zinc Plated 3/8 - 16 UNF 0.375" Fine Pitch Hexagonal Flange Nut ANSI B18.16.4 - 2018 ASTM A563 Grade C, Zinc Plated 7/16 - 14 UNF 0.4375" Fine Pitch Hexagonal Flange Nut ANSI B18.16.4 - 2018 ASTM A563 Grade C, Zinc Plated 1/2 - 12 UNF 0.5" Fine Pitch Hexagonal Flange Nut DIN 6923 - 1 Steel, Zinc Plated M5 x 0.8 5 mm Fine Pitch Hexagonal Flange Nut DIN 6923 - 1 Steel, Zinc Plated M6 x 1 6 mm Fine Pitch Hexagonal Flange Nut DIN 6923 - 1 Steel, Zinc Plated M8 x 1.25 8 mm Fine Pitch Hexagonal Flange Nut DIN 6923 - 1 Steel, Zinc Plated M10 x 1.5 10 mm Fine Pitch Hexagonal Flange Nut DIN 6923 - 1 Steel, Zinc Plated M12 x 1.75 12 mm Fine Pitch Hexagonal Flange Nut DIN 6923 - 1 Steel, Zinc Plated M14 x 2 14 mm Fine Pitch Hexagonal Flange Nut ISO 4161 - 2016 Medium Carbon Steel, Zinc Plated M5 x 0.8 5 mm Fine Pitch Hexagonal Flange Nut ISO 4161 - 2016 Medium Carbon Steel, Zinc Plated M6 x 1 6 mm Fine Pitch Hexagonal Flange Nut ISO 4161 - 2016 Medium Carbon Steel, Zinc Plated M8 x 1.25 8 mm Fine Pitch Hexagonal Flange Nut ISO 4161 - 2016 Medium Carbon Steel, Zinc Plated M10 x 1.5 10 mm Fine Pitch Hexagonal Flange Nut ISO 4161 - 2016 Medium Carbon Steel, Zinc Plated M12 x 1.75 12 mm Fine Pitch Hexagonal Flange Nut ISO 4161 - 2016 Medium Carbon Steel, Zinc Plated M14 x 2 14 mm

The ANSI/ASME B18.16.6 American All-Metal Torque Type Automotive Hexagon Lock Nut is a premium fastening solution designed to excel in high-stakes automotive environments where reliability is non-negotiable. Engineered with an innovative all-metal torque-locking mechanism, it eliminates the risk of loosening caused by vibration or thermal cycling, making it indispensable for critical applications like chassis joints, suspension linkages, and drivetrain assemblies. The hexagonal body ensures compatibility with standard tools, enabling swift installation and maintenance, while the precision-formed threads maintain consistent clamp load even under extreme dynamic stresses. Constructed from high-grade alloy steel with a durable protective coating—such as zinc or manganese phosphate—it resists corrosion from road chemicals and moisture, extending service life in harsh under-vehicle conditions. Automotive engineers specify this nut for torque-sensitive systems, including brake caliper mounts and steering knuckles, where micrometer-level preload accuracy directly impacts safety and performance. By meeting stringent ANSI/ASME dimensional and mechanical standards, it guarantees seamless integration with existing designs, reducing assembly errors and downtime. For manufacturers prioritizing fail-safe joints without compromising on weight or space, the B18.16.6 delivers unmatched tensile strength, reusability, and compliance, solidifying its role as the go-to locking fastener for next-generation automotive innovation. Designed for Ease of Use: We recognize that efficiency on the assembly line and during maintenance is crucial. The familiar hexagonal body of this lock nut ensures seamless compatibility with standard automotive tools, allowing for swift and straightforward installation and removal. This user-friendly design minimizes assembly errors and reduces valuable downtime, contributing to overall operational efficiency. Key Advantages for Your Applications: Unrivaled Resistance to Loosening: The all-metal torque-locking mechanism guarantees a secure hold under vibration and thermal cycling. Consistent Clamp Load: Precision-formed threads maintain a stable and predictable clamp load, even when subjected to extreme dynamic stresses encountered in demanding automotive applications. Standard Tool Compatibility: The hexagonal body integrates seamlessly with existing standard tools, simplifying installation and maintenance procedures. Exceptional Durability: Constructed from high-grade alloy steel, ensuring superior strength and long-lasting performance in critical joints. Superior Corrosion Resistance: Protected by a robust coating, such as zinc plating or manganese phosphate, it effectively resists corrosion from harsh road chemicals, moisture, and other environmental factors prevalent in under-vehicle conditions, significantly extending the service life of the fastener. Micrometer-Level Preload Accuracy: Specifically engineered for torque-sensitive systems, allowing for precise preload control that directly impacts the safety and performance of critical components. Seamless Integration: Meets stringent ANSI/ASME dimensional and mechanical standards, guaranteeing effortless integration with existing automotive designs and minimizing assembly complications. Fail-Safe Joint Integrity: Provides manufacturers with the confidence of a highly reliable joint, minimizing the risk of failure without adding unnecessary weight or bulk to the assembly. Exceptional Tensile Strength: The high-grade alloy steel construction delivers unmatched tensile strength, ensuring the integrity of even the most demanding automotive connections. Reusability: Designed for potential reuse in maintenance operations, offering long-term cost-effectiveness. Full Compliance: Meets and exceeds stringent ANSI/ASME B18.16.6 standards, guaranteeing adherence to industry best practices and regulatory requirements. Contribution to Next-Generation Innovation: A trusted component for engineers pushing the boundaries of automotive design and performance. Ideal for: Chassis Joints: Ensuring the structural integrity and stability of the vehicle frame. Suspension Linkages: Maintaining precise control and responsiveness of the suspension system. Drivetrain Assemblies: Securing critical components within the power transmission system. Brake Caliper Mounts: Providing a fail-safe connection for a vital safety system. Steering Knuckles: Ensuring accurate and reliable steering control. Wheel Hub Assemblies: Maintaining the secure attachment of wheels to the vehicle. Engine Mounts: Providing a robust and vibration-resistant connection for the engine. Exhaust System Mounts: Withstanding high temperatures and vibrations while ensuring secure attachment. Any torque-sensitive automotive application where loosening can compromise safety or performance. Product name Standard Material Diameter Length Torque Type Hexagon Nut GB/T 6170 - 2015 Medium Carbon Steel, Zinc Plated M6 5 mm Torque Type Hexagon Nut GB/T 6170 - 2015 Medium Carbon Steel, Zinc Plated M8 6 mm Torque Type Hexagon Nut GB/T 6170 - 2015 Medium Carbon Steel, Zinc Plated M10 8 mm Torque Type Hexagon Nut GB/T 6170 - 2015 Medium Carbon Steel, Zinc Plated M12 10 mm Torque Type Hexagon Nut GB/T 6170 - 2015 Medium Carbon Steel, Zinc Plated M16 14 mm Torque Type Hexagon Nut GB/T 6170 - 2015 Medium Carbon Steel, Zinc Plated M20 18 mm Torque Type Hexagon Nut ASME B18.2.2 - 2016 ASTM A563 Grade A, Zinc Plated 1/4" 0.25" Torque Type Hexagon Nut ASME B18.2.2 - 2016 ASTM A563 Grade A, Zinc Plated 5/16" 0.312" Torque Type Hexagon Nut ASME B18.2.2 - 2016 ASTM A563 Grade A, Zinc Plated 3/8" 0.375" Torque Type Hexagon Nut ASME B18.2.2 - 2016 ASTM A563 Grade A, Zinc Plated 7/16" 0.438" Torque Type Hexagon Nut ASME B18.2.2 - 2016 ASTM A563 Grade A, Zinc Plated 1/2" 0.5" Torque Type Hexagon Nut ASME B18.2.2 - 2016 ASTM A563 Grade A, Zinc Plated 9/16" 0.562" Torque Type Hexagon Nut ANSI B18.16.3 - 2013 SAE J429 Grade 5, Zinc Plated 0.25" 0.25" Torque Type Hexagon Nut ANSI B18.16.3 - 2013 SAE J429 Grade 5, Zinc Plated 0.3125" 0.3125" Torque Type Hexagon Nut ANSI B18.16.3 - 2013 SAE J429 Grade 5, Zinc Plated 0.375" 0.375" Torque Type Hexagon Nut ANSI B18.16.3 - 2013 SAE J429 Grade 5, Zinc Plated 0.4375" 0.4375" Torque Type Hexagon Nut ANSI B18.16.3 - 2013 SAE J429 Grade 5, Zinc Plated 0.5" 0.5" Torque Type Hexagon Nut ANSI B18.16.3 - 2013 SAE J429 Grade 5, Zinc Plated 0.5625" 0.5625" Torque Type Hexagon Nut DIN 980M - 2017 10B21 Steel, Zinc Plated M6 5 mm Torque Type Hexagon Nut DIN 980M - 2017 10B21 Steel, Zinc Plated M8 6 mm Torque Type Hexagon Nut DIN 980M - 2017 10B21 Steel, Zinc Plated M10 8 mm Torque Type Hexagon Nut DIN 980M - 2017 10B21 Steel, Zinc Plated M12 10 mm Torque Type Hexagon Nut DIN 980M - 2017 10B21 Steel, Zinc Plated M16 14 mm Torque Type Hexagon Nut DIN 980M - 2017 10B21 Steel, Zinc Plated M20 18 mm