... screw Material:steel Treatment:white zinc Head:hexagon head Size: M6*15, M6*20 Product name: machine 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 ...