... screw, 3.hardwere screw, ball screw 4.Screw bolt and nut 5.Standard: JIS, BS, DIN, Product name: aluminum machined tube ... , bolts and nuts, self drilling screw, self tapping screw, machine screw, furniture screwdrywall screw, screw nut, screw cap,High strength boltsSpecification:1) Meterials ...