... DIN125,DIN9021,DIN440,DIN436,F436,DIN127,1.name:spring washer2.material:carbon steel , stainless steel ,3.size:all size4.surface: zinc plated , plain ... , nuts, machine screws, plain washers, spring lock washers, wood screws, tapping screws ... steel, alloy & stainless steel, aluminum, brass or other special materials. For finishing, we provide black oxide, zinc electroplating, phosphate, copper plating ...