... 3.Copper and copper alloy fasteners including retaining ring (1) beryllium copper , beryllium copper wave washer, beryllium copper saddle washers, beryllium copper internal ... bronze, phosphor bronze gear such as washers, (3) copper washers, brass washers, etc. 4 insulation gasket series ... a low carbon steel, 65MN, phosphor bronze, beryllium copper, stainless steel, nylon and other. The surface ...