DIN7504K self drilling screw Hangzhou Huachao Fastener Co., Ltd. Base Info Material:Carbon SteelShape of Head:HexagonSurface Finishing:Zinc PlatedCertification:ISO, GSCustomized:CustomizedSize:Customization, Metric,Inch, Made to OrderTrademark:HANGCHAOOrigin:CHINA Description Pre:Roast Color Hex Washer Head Self Drilling Screw Next:Ss304 Pan Head Machine Screw