Roast Color Hex Washer Head Self Drilling Screw Hangzhou Huachao Fastener Co., Ltd. Base Info Material:Carbon SteelShape of Head:HexagonSurface Finishing:Zinc PlatedCertification:ISO, GSCustomized:CustomizedTrademark:HANGCHAOOrigin:CHINA Description Pre:Din 7976 Hex Head Self Tapping Screw Next:DIN7504K self drilling screw