Auto Racing Products 12-Point Chromoly Bolt Kit — 5/16-18 x 1.250 Universal Fasteners

SKU: BQDN_641-1250
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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.

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High-Strength 12-Point Chromoly Bolts

Ensure your engine and chassis components stay secure under extreme pressure with these premium Auto Racing Products 12-point bolts. Engineered for high-performance applications, these 5/16-18 x 1.250 inch fasteners provide superior clamping force compared to standard hardware. The 12-point head design allows for higher torque settings and easier access in tight engine bays, making them a favorite for professional builders and racing enthusiasts alike.

Technical Specifications

  • Thread Size: 5/16-18
  • Under-Head Length: 1.250 inches
  • Head Style: 3/8-inch 12-Point
  • Material: High-Tensile Chromoly Steel
  • Finish: Durable Black Oxide Coating
  • Quantity: Set of 5 Bolts

These bolts are manufactured from heat-treated chromoly steel, offering exceptional fatigue resistance and tensile strength. The black oxide finish provides a sleek look while offering essential corrosion resistance for long-term durability in harsh racing environments. Whether you are assembling a custom intake, securing brackets, or performing critical engine maintenance, these fasteners deliver the peace of mind you need on the track. Trust the quality and precision of these professional-grade fasteners available at GGCRACING for your next project.

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

High-Strength 12-Point Chromoly Bolts

Ensure your engine and chassis components stay secure under extreme pressure with these premium Auto Racing Products 12-point bolts. Engineered for high-performance applications, these 5/16-18 x 1.250 inch fasteners provide superior clamping force compared to standard hardware. The 12-point head design allows for higher torque settings and easier access in tight engine bays, making them a favorite for professional builders and racing enthusiasts alike.

Technical Specifications

  • Thread Size: 5/16-18
  • Under-Head Length: 1.250 inches
  • Head Style: 3/8-inch 12-Point
  • Material: High-Tensile Chromoly Steel
  • Finish: Durable Black Oxide Coating
  • Quantity: Set of 5 Bolts

These bolts are manufactured from heat-treated chromoly steel, offering exceptional fatigue resistance and tensile strength. The black oxide finish provides a sleek look while offering essential corrosion resistance for long-term durability in harsh racing environments. Whether you are assembling a custom intake, securing brackets, or performing critical engine maintenance, these fasteners deliver the peace of mind you need on the track. Trust the quality and precision of these professional-grade fasteners available at GGCRACING for your next project.

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

High-Strength 12-Point Chromoly Bolts

Ensure your engine and chassis components stay secure under extreme pressure with these premium Auto Racing Products 12-point bolts. Engineered for high-performance applications, these 5/16-18 x 1.250 inch fasteners provide superior clamping force compared to standard hardware. The 12-point head design allows for higher torque settings and easier access in tight engine bays, making them a favorite for professional builders and racing enthusiasts alike.

Technical Specifications

  • Thread Size: 5/16-18
  • Under-Head Length: 1.250 inches
  • Head Style: 3/8-inch 12-Point
  • Material: High-Tensile Chromoly Steel
  • Finish: Durable Black Oxide Coating
  • Quantity: Set of 5 Bolts

These bolts are manufactured from heat-treated chromoly steel, offering exceptional fatigue resistance and tensile strength. The black oxide finish provides a sleek look while offering essential corrosion resistance for long-term durability in harsh racing environments. Whether you are assembling a custom intake, securing brackets, or performing critical engine maintenance, these fasteners deliver the peace of mind you need on the track. Trust the quality and precision of these professional-grade fasteners available at GGCRACING for your next project.

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