Black Washer - 1/2 ID x 2.000 OD w/Chamfer (1pk)

The Black Washer – 1/2 ID x 2.000 OD w/Chamfer (1pk) by ARP is a precision fastener component engineered for high-performance applications in firearms assembly, tactical builds, and automotive systems. This hardened steel washer is designed to distribute load evenly across bolt and screw joints, preventing surface deformation and ensuring repeatable, reliable assembly integrity. Whether you're building an AR platform, maintaining duty weapons, or assembling critical mechanical systems, this washer provides the foundational support that separates amateur builds from professional-grade work.

Manufactured to ARP specifications, this black oxide-finished washer features a 1/2-inch inner diameter (ID) and 2.000-inch outer diameter (OD) with a chamfered edge—a critical design detail that prevents binding during installation and reduces stress concentration at sharp edges. The chamfer geometry allows fasteners to seat smoothly while the black finish provides corrosion resistance and a professional appearance consistent with modern tactical aesthetics. At just 0.22 lbs, this single-pack washer is lightweight yet robust enough for load-bearing applications requiring consistent clamping force and vibration resistance.

Law enforcement armorers, gunsmiths, and platform builders rely on ARP fasteners for upper and lower receiver assemblies, trigger group installation, and free-float barrel mounting where precision tolerances are non-negotiable. This washer's dimensions make it ideal for 1/2-inch bolt applications across AR-15, AR-10, and similar modular systems. Stock this essential component in your maintenance kit or build bag to ensure proper load distribution, prevent fastener walk-out under recoil, and maintain the dimensional stability your weapon system demands under sustained operational use.