Countersunk Washer Black #10 10pk

The ALLSTAR PERFORMANCE Countersunk Washer Black #10 10-pack (SKU ALL 18661) is a vital fastener solution for automotive assembly, engine building, and precision mechanical work. These washers are designed to sit flush with bolt heads in countersunk applications, creating a clean and professional appearance. Ideal for race engines, custom hot rods, and restoration projects, this 10-pack provides the necessary quantity for most single-project needs.

Constructed from hardened steel with a black oxide finish, each countersunk washer is specifically designed for #10 fasteners. The precisely formed conical depression allows the bolt head to nest completely flush against the mating surface. The black oxide coating offers some corrosion resistance, but users should consider the specific application to ensure compatibility with visible components.

These washers are particularly beneficial for engine builders, restoration specialists, and automotive enthusiasts who require aesthetic flush mounting in their bolt-down component assembly. The countersunk design effectively distributes fastener load, reducing the risk of surface damage and improving clamping integrity on materials commonly used in modern engine modifications.