... lock washers, serrated lock washers, conical serrated washers, snap ring , wire snap rings2. German standard (DIN), a series ... DIN125, etc. 3.Copper and copper alloy fasteners including retaining ring (1) beryllium copper , beryllium copper wave washer, beryllium ... graphite gasket of nylon, polyester film gasket, nylon pads, red (black) steel pad. Epoxy plate gaskets, plastic gaskets and other5. ...