Black Washer - 12mm ID x .995 in OD (1pk)

The Black Washer - 12mm ID x .995 in OD (1pk) from ARP is a precision-engineered fastening component designed for demanding applications where load distribution and vibration resistance are critical. This single-pack washer serves as a foundational element in mechanical assemblies, automotive builds, and tactical equipment configurations where proper bearing surface is essential. Whether you're assembling firearm components, securing structural fasteners, or completing precision machinery work, this washer ensures even stress distribution across bolt and surface interfaces.

Manufactured with a 12mm inner diameter (ID) and .995 inch outer diameter (OD), this black washer delivers optimal contact geometry for standard M12 fastening applications. The precision-machined design minimizes micro-movement and bolt creep—critical factors in high-vibration environments common to automotive, industrial, and tactical systems. The black finish provides corrosion resistance and allows for visual identification in mixed fastener kits, while the carefully calculated OD-to-ID ratio maximizes bearing surface without compromising clearance in tight mechanical spaces.

This washer is ideal for builders and technicians who demand quality in every fastening detail, from precision rifle builds to industrial equipment assembly. Professionals and enthusiasts choose ARP fastening components for their reliability under extreme conditions—thermal cycling, recoil impulse, and sustained vibration all demand washers that maintain clamp load integrity. Install this washer under bolt heads or nuts in any M12 application requiring superior load distribution and long-term fastener security.