10mm ID SS Washers 10pk .865 OD

The 10mm ID SS Washers 10pk by ARP are precision-engineered fastener components designed for high-performance engine builds, competition firearms, and tactical equipment assembly. These stainless steel washers distribute load evenly across fastened joints, preventing surface damage and loosening under vibration—critical in applications where bolt failure is not an option. Whether you're assembling AR platforms, engine blocks, or duty gear, ARP washers are the professional choice for builders who demand reliability and consistency.

Manufactured from corrosion-resistant stainless steel, these washers feature a 10mm inner diameter with a 0.865-inch outer diameter, providing optimal bearing surface for M10 fasteners and applications requiring metric hardware. The 10-pack quantity ensures you have spares on hand for assembly, repair, or replacement scenarios. Stainless construction resists rust and oxidation in harsh environments—salt air, high-humidity storage, or field conditions—while maintaining the clamping force integrity that ARP fastening systems are known for in both motorsport and tactical communities.

Operators, gunsmiths, and equipment technicians rely on ARP fasteners because they eliminate variables in critical assemblies. Use these 10mm ID stainless steel washers alongside ARP bolts for upper and lower receiver assembly, charging handle installations, or any metric-threaded connection where load distribution matters. They're also essential for engine work on competition builds or tactical vehicle platforms. The compact packaging—0.25 lbs for ten washers—makes them ideal for field kits, maintenance bags, or shop inventory.