Hex Washer Head Machine Screws are intended for use with a threaded hole or a nut. Hex Washer Head Machine Screws are threaded fasteners with a hex head and built-in washer extending beyond the hex, providing the Hex Washer Head with a greater bearing surface. They provide high clamping force, resist loosening, and are commonly used in engine, chassis, body and interior assembly. Finish: .0002" Cadmium & Wax.
