hex head self tapping screw DIN7976 Hangzhou Huachao Fastener Co., Ltd. Base Info Material:Carbon SteelShape of Head:HexagonSurface Finishing:Zinc PlatedCertification:ISO, GSCustomized:CustomizedTrademark:HANGCHAOSpecification:DINOrigin:ChinaHS Code:73181500 Description Pre:Stainless Steel 304 /316 Carriage Bolt Next:Hex Washer Serrarte Flange Bolts