Serrated Hex Washer Head Thread Forming Screws

Serrated Hex Washer Head Thread Forming Screws Material C1022 Screw head Hex washer head Screw drive External hex Screw thread Trilobular thread Dimension As customer's requires Finish Galvanized Features Good anti-corrosion ability Certification ISO9001:2008, SGS, RoHS, Bureau Veritas After-sale service If there are any quality problems, please contact with us at once We are the professional Manufacturer of Fasteners, since 1999, ISO, RoHS, SGS, Bureau Veritas Certificated,