Pan Flaming Head Self Drilling Screw(Pf Screw) Hangzhou Huachao Fastener Co., Ltd. Base Info Model NO.:DIN7504Material:Carbon SteelShape of Head:RoundSurface Finishing:Zinc PlatedCertification:ISO, GSCustomized:CustomizedTrademark:HANGCHAOOrigin:ChinaHS Code:73181400 Description Pre:Din7976 Hex washer Head Self Tapping Screw Next:Special Bolts and Nuts for Railway