Auto Racing Products 12-Point Chromoly Bolt Kit — 5/16-18 x 4.000 Universal Fasteners

SKU: BQDN_641-4000
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About Auto Racing Products ARP (Automotive Racing Products) makes the ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Watch in action

Extra-Long 12-Point Chromoly Fasteners

When your build requires longer fasteners, trust the strength of Auto Racing Products 12-point bolts. These 5/16-18 x 4.000 inch bolts are designed for applications where standard lengths fall short, providing the necessary reach without compromising on clamping force. The 12-point head design ensures you can achieve the exact torque specifications required for your high-performance engine or chassis setup.

Key Features & Specs

  • Thread Size: 5/16-18
  • Under-Head Length: 4.000 inches
  • Head Style: 3/8-inch 12-Point
  • Material: Heat-Treated Chromoly
  • Finish: Black Oxide
  • Quantity: 5-Pack

Engineered from high-tensile chromoly steel, these bolts are built to handle the intense vibration and heat common in racing environments. The black oxide finish provides a professional look while resisting rust and oxidation. Whether you are working on custom mounting solutions, deep-reach engine components, or heavy-duty chassis bracing, these bolts deliver the reliability and performance you demand. The 12-point head allows for easier wrench access in tight spots, saving you time and frustration during assembly. Ensure your vehicle is built to last with the highest quality hardware available. Find all your specialized racing components and fasteners at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Watch in action

Extra-Long 12-Point Chromoly Fasteners

When your build requires longer fasteners, trust the strength of Auto Racing Products 12-point bolts. These 5/16-18 x 4.000 inch bolts are designed for applications where standard lengths fall short, providing the necessary reach without compromising on clamping force. The 12-point head design ensures you can achieve the exact torque specifications required for your high-performance engine or chassis setup.

Key Features & Specs

  • Thread Size: 5/16-18
  • Under-Head Length: 4.000 inches
  • Head Style: 3/8-inch 12-Point
  • Material: Heat-Treated Chromoly
  • Finish: Black Oxide
  • Quantity: 5-Pack

Engineered from high-tensile chromoly steel, these bolts are built to handle the intense vibration and heat common in racing environments. The black oxide finish provides a professional look while resisting rust and oxidation. Whether you are working on custom mounting solutions, deep-reach engine components, or heavy-duty chassis bracing, these bolts deliver the reliability and performance you demand. The 12-point head allows for easier wrench access in tight spots, saving you time and frustration during assembly. Ensure your vehicle is built to last with the highest quality hardware available. Find all your specialized racing components and fasteners at GGCRACING.

Product Details

Product Description

About Auto Racing Products

ARP (Automotive Racing Products) makes the strongest fasteners in motorsport — head studs, main studs, rod bolts, and flexplate bolts used by every Formula 1, NHRA, NASCAR, and championship motorsport program. Aerospace-grade alloys, exact-fit machining.

Watch in action

Extra-Long 12-Point Chromoly Fasteners

When your build requires longer fasteners, trust the strength of Auto Racing Products 12-point bolts. These 5/16-18 x 4.000 inch bolts are designed for applications where standard lengths fall short, providing the necessary reach without compromising on clamping force. The 12-point head design ensures you can achieve the exact torque specifications required for your high-performance engine or chassis setup.

Key Features & Specs

  • Thread Size: 5/16-18
  • Under-Head Length: 4.000 inches
  • Head Style: 3/8-inch 12-Point
  • Material: Heat-Treated Chromoly
  • Finish: Black Oxide
  • Quantity: 5-Pack

Engineered from high-tensile chromoly steel, these bolts are built to handle the intense vibration and heat common in racing environments. The black oxide finish provides a professional look while resisting rust and oxidation. Whether you are working on custom mounting solutions, deep-reach engine components, or heavy-duty chassis bracing, these bolts deliver the reliability and performance you demand. The 12-point head allows for easier wrench access in tight spots, saving you time and frustration during assembly. Ensure your vehicle is built to last with the highest quality hardware available. Find all your specialized racing components and fasteners at GGCRACING.

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