Black Washers - 3/8 ID x 5/8 OD (2)

The Black Washers – 3/8 ID x 5/8 OD (2) from ARP are precision fastener components designed for firearms assembly and tactical builds. These washers are essential for ensuring proper fastener seating and preventing surface damage during equipment maintenance. They are particularly useful for armorer-level tasks and custom tactical configurations.

Constructed from hardened steel, these washers feature a black oxide finish that provides corrosion resistance while matching military specifications for aesthetics. The 3/8-inch inner diameter accommodates standard fasteners, while the 5/8-inch outer diameter ensures adequate load distribution across receiver materials. This design helps prevent deformation or stress concentration during use.

These washers are beneficial for armorers, gunsmiths, and tactical end-users, especially during build cycles and field repairs. While they are compatible with many applications that utilize 3/8-inch fasteners, users should verify compatibility with their specific receiver types. The two-pack quantity is ideal for paired fastener points commonly found in various firearm assemblies.