ARP .875in OD x 7/16in ID Insert Washers (10 pack)

This ARP performance fastener, stud, bolt, tool, or assembly is the .875in OD x 7/16in ID Insert Washers (10 pack). Confirm the exact engine or vehicle application, thread size, length, material, strength series, included quantity, installation lubricant, tightening sequence, and current ARP torque specification before ordering.

Key Features

• Exact Dimensions: 0.875in outer diameter x 7/16in inner diameter matches LS head stud holes precisely to prevent movement.
• Hardened Steel Build: Resists deformation under 200+ ft-lbs torque for repeated engine disassembly.
• ARP Engineering: Tested for racing applications to maintain clamp load over thousands of miles.
• Direct Replacement: Works with ARP Pro Series LS head studs for factory-like fit in aluminum heads.
• Heat-treated alloy steel with black oxide finish for corrosion resistance and high strength.
• No, designed for cathedral port LS1 LS2 LS6 heads. LS3 uses different stud spacers.

Fitment

Specifications

What’s Included

One new ARP hardware kits – other in the exact configuration and quantity identified by this listing. Brackets, wiring, air lines, fittings, switches, fasteners, fitting kits, fluids, covers, and accessories are included only when expressly stated for this exact part.

About ARP

Automotive Racing Products manufactures high-performance studs, bolts, nuts, washers, wheel hardware, assembly tools, and installation lubricants for engine, drivetrain, chassis, and racing applications. Thread dimensions, material, preload method, lubricant, torque, and included quantity remain exact-part specific.

Important Disclosures

• California Proposition 65 warning applies. Review the current manufacturer warning before handling or installation.

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• Shop all ARP products
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• ARP 02-06 Mini Cooper S Cam Sprocket Bolt Kit

Frequently Asked Questions

How do I confirm the .875in OD x 7/16in ID Insert Washers (10 pack) fits my application?
Match the exact engine family or vehicle, component location, thread diameter and pitch, under-head length, material, strength series, and every current ARP application note.

Can I reuse the factory torque value with this ARP hardware?
Not automatically. Use ARP’s current instructions for the exact part, material, lubricant, tightening sequence, and preload method. Factory torque values may be based on different hardware and friction.

What is included with this ARP kit?
Only the studs, bolts, nuts, washers, lubricant, and tools expressly listed for this exact part number are included. Verify the required quantity before disassembly.

Installation Instructions

1. Confirm ARP part number 200-8598, the complete application, and every required supporting component before beginning work.
2. Clean and inspect all mating threads and components, then verify thread engagement, length, washers, nuts, lubricant, and required preparation before assembly.
3. Follow ARP’s current tightening sequence, lubricant instructions, torque or stretch method, and any retorque procedure for this exact part.
4. Verify clearance, preload, fastener seating, and normal component operation before returning the vehicle or engine to service.