The .375-.875 MS27183 Military Flat Washer Cadmium is a flat, circular washer with an inner diameter of .375 inches and an outer diameter of .875 inches. It is made of cadmium-plated steel and is designed to be used with bolts and screws to distribute the load and prevent damage to the surface of the material being fastened. The washer has a thickness of .031 inches and a weight of .01 pounds. It meets the specifications of MS27183 and is commonly used in military and aerospace applications.