Black Washers - 3/8 ID x 1.200 OD w/Chamfer 10pk

The Black Washers - 3/8 ID x 1.200 OD w/Chamfer 10pk from ARP delivers precision-engineered fastening solutions for high-performance applications where standard washers fall short. Designed for builders, machinists, and motorsports professionals, these chamfered washers provide superior load distribution and component protection in critical fastening scenarios. The 10-pack format makes them ideal for both single-project builds and shop inventory management.

Manufactured from chromoly steel with a black oxide finish, each washer features a 3/8-inch inner diameter (ID) and 1.200-inch outer diameter (OD) with a precision-chamfered edge that reduces stress concentrations and prevents sharp edges from damaging softer fastener heads. The 0.12-inch thickness provides robust load-bearing capacity while the black oxide coating offers corrosion resistance and a professional appearance. The chamfered design—a hallmark of ARP's engineering—facilitates easier fastener installation and promotes more even pressure distribution across mounting surfaces.

These washers excel in engine rebuild applications, suspension work, transmission assembly, and any scenario requiring specification-grade fastening hardware. ARP's reputation in high-strength fastener design means these washers are trusted by engine builders for cylinder head work, intake manifold sealing, and other critical pressure-bearing assemblies. Compatibility spans 3/8-inch bolt sizes across most automotive, motorcycle, and industrial applications where superior clamping load consistency is non-negotiable.