The 7/16 x .016 NAS1149 Military Flat Washer is a thin, round metal disc with a hole in the center. It is used to distribute the load of a bolt or screw, and to prevent damage to the surface of the material being fastened. This washer is made of 18-8 stainless steel, which is corrosion-resistant and has high strength. It meets the requirements of DFAR, which is a set of regulations that govern the procurement of goods and services by the US Department of Defense.