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SKU: 200-8536 | UPC: 672036030292
ARP M12 ID .750 OD No Chamfer Washers (Pack of 10) for Chevy LS Ford Coyote Modular Engines
ARP no chamfer washers ensure even load distribution under M12 studs and bolts in demanding engine assemblies. These fit Chevy LS-series engines from 1997 onward and Ford Modular 4.6L 5.0L Coyote platforms for reliable performance. Pack of 10 supports complete head or main stud installations with precise fit.
Key Features
- 8740 Chromoly Steel Construction: Forged from high-grade alloy for strength exceeding 200,000 psi tensile rating after heat treatment
- No Chamfer Design: Flat edges provide full contact surface preventing edge bite in tight clearance spots
- Precision Dimensions: M12 inner diameter pairs exactly with ARP studs paired with 0.750 inch outer diameter
- Heat Treated Durability: Processed to withstand extreme torque and repeated engine cycles
- Black Oxide Finish: Shields against rust and galling during assembly and operation
Product Notes
- Standard thickness around 0.060 inches supports optimal stud preload
- Pair exclusively with ARP fasteners to achieve rated clamping force
- Compact packaging prevents damage in transit
Installation Notes
- Professional installation recommended.
- Position washer directly under stud or bolt head for even pressure
- Use ARP Ultra-Torque fastener lubricant and follow torque values from stud kit instructions
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2013 | Chevrolet | Corvette | Base Z06 LS1 LS2 LS3 LS7 |
| 1998-2002 | Chevrolet | Camaro | Z28 SS LS1 |
| 1999-2013 | Chevrolet GMC | Silverado Sierra 1500 | 5.3L 6.0L LM7 LQ4 LQ9 |
| 2011-2023 | Ford | Mustang | GT 5.0 Coyote |
| 1996-2010 | Ford | Mustang | GT 4.6L 5.4L Modular |
| 2004-2010 | Ford | F-150 | 5.4L Modular |
Why Choose ARP?
- Fasteners power NHRA Top Fuel and Pro Stock dragsters
- USA-made with exact tolerances for racing reliability
- Backed by limited lifetime warranty against failure
Frequently Asked Questions
-
Q: Do these washers work with ARP LS head stud kits?
A: Yes designed for ARP Chevy LS1 LS2 LS3 LS7 and Gen III IV head main stud kits with M12 threads -
Q: What material and thickness?
A: Built from heat-treated 8740 chromoly steel approximately 0.060 inches thick with black oxide finish -
Q: What torque process?
A: Apply ARP lube torque in stages per instructions professional install advised for accuracy
Shipping & Handling
- Method: UPS Ground USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective poly bag in 1 x 1 x 1 inch box
- Weight: 0.05 lbs
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