The 5/8 USS Flat Washer Black Oxide is a versatile and durable washer designed to distribute the load of a fastener evenly over a surface. Made from high-quality steel, this washer features a black oxide finish for enhanced corrosion resistance. Its flat design ensures a secure and stable connection, preventing the fastener from sinking into the material. The 5/8 diameter is suitable for use with bolts and screws of the same size. Whether youre working on automotive, construction, or industrial projects, this flat washer provides reliable pe