Click to zoom in
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
ARP Head Studs
ARP head stud kits for internal engine builds are stocked at Black Ops Auto Works. Shop ARP head stud and bolt kits, main stud kits, and rod bolt kits engineered for HEMI, Ford Modular and Coyote, GM LS, Subaru EJ, Honda K and B series, VW/Audi turbo four cylinders, Porsche, BMC, and Renault engines, along with the Ultra-Torque assembly lubricant every kit depends on. Every product is filterable by year, make, model, and engine platform so the correct fastener kit ships the first time. Black Ops Auto Works carries 812 ARP Head Studs SKUs across 8740 chromoly and ARP2000 alloy options. What This Collection Covers ARP head studs replace factory head bolts with precision-machined threaded studs that thread into the block and allow the nut to be torqued concentrically on a stationary fastener, producing more even and repeatable clamping force across the entire head gasket surface than a factory head bolt design. This collection focuses on the internal engine fasteners that hold the ...
View ARP Head Studs Products
Hardware
Engine hardware, fasteners, and mounting hardware kits for builds, fabrication, and suspension work are stocked at Black Ops Auto Works. Shop ARP engine bolts and stud kits, suspension mounting hardware from Fox and Rock Krawler, bumper mount kits, tie rod clamps, joint retainer tools, and single and kit-packaged hardware for domestic, import, and off-road platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 945 Hardware SKUs across engine hardware, suspension mounting hardware, and single-piece or kit-packaged fasteners. What This Collection Covers Hardware groups together the fasteners, mounting kits, clamps, and small components that hold engines, suspension systems, and accessories together. This includes ARP engine hardware such as intake manifold bolts and cam bolt kits, suspension mounting hardware from Fox and Rock Krawler for shock and steering stabilizer installs...
View Hardware Products
Hardware Kits - Other
Hardware kits and fastener assortments for engine builds, suspension installs, body and trim jobs, and off road rigs are stocked at Black Ops Auto Works. Shop ARP bolt and stud kits, brake caliper hardware, suspension bushing hardware, leaf spring hardware kits, security fastener kits, and general clip and retainer assortments across domestic and import platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 593 Hardware Kits - Other SKUs across engine, suspension, body, and lighting hardware categories. What This Category Covers The Hardware Kits - Other category groups together fastener kits and hardware assortments that do not fall under a single dedicated part category. Coverage spans engine fastener kits like cam bolts and intake manifold bolts, suspension hardware including bushing pivot washers and leaf spring hardware, seat belt mounting hardware, security hardware fo...
View Hardware Kits - Other Products