... 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 ... , E-coating, Silkscreen, Heat treatment, Black oxid;4) Standard/ specification: OEM service as per customers' requests, with in-house tooling design ...