Hex Washer Head Self Drilling Screw Hangzhou Huachao Fastener Co., Ltd. Base Info Material：Stainless SteelType：Hexagon Head with FlangeHead Style：HexagonalGrade：8.8Trademark：HANGCHAOSpecification：DIN7981Origin：ChinaHS Code：73181400 Description Pre：Flat Washer DIN125A Next：Modified Truss Head Self Drilling Screw
