... and nuts, self drilling screw, self tapping screw, machine screw, furniture screwdrywall screw, screw nut, screw cap,High ... boltsSpecification:1) Meterials: carbon steel, stainless steel, metal, brass, copper, zinc alloy, cold rolled steel with various plating ... flat, oval, truss, hexagon flange, bugle, wafer, hinge, binding, button, truss3) Surface treatment: kinds of plating (Zinc, Nikel, Chrome, ...