ARP 1/4-20 x 0.515 12pt Black Oxide Bolts

SKU: 640-0515 | UPC: 672036016852

ARP 1/4-20 x 0.515 12pt Black Oxide Bolts for 1955+ Chevy Small Block Ford V8 Engines

ARP 1/4-20 x 0.515 12pt Black Oxide Bolts secure valve covers intakes brackets and hardware on 1955-current Chevrolet Small Block V8s and 1962-1997 Ford Small Block V8s. These 200000 PSI fasteners deliver reliable clamping force under high heat vibration and loads in performance engines. Engine builders choose them for consistent torque retention and fatigue resistance in demanding applications.

Key Features

• 12-Point Head: Distributes torque evenly to prevent cam-out stripping and galling during installation
• Black Oxide Finish: Provides corrosion resistance in harsh oily wet engine environments
• High Tensile Strength: 200000 PSI rating withstands extreme pressures and repeated stress cycles
• Rolled Threads: Increases fatigue strength and shear resistance compared to cut threads
• Precise Dimensions: 1/4-20 thread pitch with 0.515-inch length under head for flush secure fitment

Product Notes

• Sold as individual bolts for custom builds or replacements
• Inspect hole depth and thread engagement before use
• Ships in anti-static protective packaging

Installation Notes

• Professional installation recommended.
• Torque to 18-25 ft-lbs dry or use ARP Ultra-Torque lubricant for accurate results
• Compatible with steel aluminum tapped holes in OEM or aftermarket parts

This Part Fits

Year	Make	Model	Submodel
1955-2000	Chevrolet	Small Block V8 Engines	262-400 cid
1967-2002	Chevrolet	Camaro	V8
1965-1982	Chevrolet	Corvette	Small Block V8
1962-1997	Ford	Small Block V8 Engines	260-351 Windsor
1964-1973	Ford	Mustang	V8
1967-1981	Ford	F-100 F-150	Small Block V8

Why Choose ARP?

• Trusted by NHRA Top Fuel teams and millions of engine builds
• Forged from 8740 chrome-moly steel with exact heat treatment
• Every bolt tested for dimensional accuracy and load capacity

Frequently Asked Questions

• Q: What performance engines use these 1/4-20 x 0.515 bolts?
  A: Common in Chevy Small Block and Ford Windsor V8s for valve cover perimeter bolts intake hold-downs and bracket mounts. Always measure your application.
• Q: What material and finish do ARP 640-0515 bolts have?
  A: 8740 alloy steel construction with black oxide coating rated at 200000 PSI tensile strength and Rc 33-39 hardness.
• Q: What warranty covers these ARP bolts?
  A: ARP provides warranty against defects in materials and workmanship when installed and used correctly.

Shipping & Handling

• Method: USPS First Class or UPS Ground
• Availability: In stock – ships same or next business day
• Packaging: Protective poly bag in 4 x 3 x 1 inch box
• Weight: 0.02 lbs