The .250-.562 MS27183 Military Flat Washer Cadmium is a thin, disc-shaped metal washer with a flat surface and a central hole. It is designed to be placed between a bolt or screw and a surface to distribute the load and prevent damage to the surface. The washer is made of cadmium-plated steel, which provides corrosion resistance and durability. It has a diameter of .562 inches and a thickness of .250 inches. The washer meets the specifications of Military Standard MS27183 and is commonly used in military and aerospace applications.