... female screwRelated Products: wood screw, chipboard screw, ball screw, hex head screwbolt screw, bolts and nuts, self drilling screw, self tapping screw, machine screw, furniture screwdrywall screw, screw nut, screw cap,High strength boltsSpecification ... alloy, cold rolled steel with various plating 2) Head style: pan, round, flat, oval, truss, hexagon flange, bugle, wafer, hinge, binding, button ...