Hex Head Self Dilling Screw(EPDM Washer) Hangzhou Huachao Fastener Co., Ltd. Base Info Material:Carbon SteelType:Hexagon HeadHead Style:HexagonalConnection:Self DrillingGrade:8.8Trademark:HANGCHAOOrigin:ChinaHS Code:73181400 Description Pre:Square Washers (DIN436) (M10-52) Next:Hex Flange Head SDS With EPDM Bonded Washer (SUS304)