DIN7504K self drilling screw with EPDM washer Hangzhou Huachao Fastener Co., Ltd. Base Info Material:Carbon SteelShape of Head:HexagonSurface Finishing:Zinc PlatedCertification:ISO, GSCustomized:CustomizedTrademark:HANGCHAOOrigin:CHINA Description Pre:Ss304 Pan Head Machine Screw Next:Insulating Railway Plate, Insulated Fastenings