Din7976 Hex washer Head Self Tapping Screw Hangzhou Huachao Fastener Co., Ltd. Base Info Model NO.:DIN7504NMaterial:Carbon SteelType:Hexagon HeadGroove:HexagonTrademark:HANGCHAOOrigin:ChinaHS Code:73181500 Description Pre:Pan Head Self Dilling Screw(Stainless Steel Din7504n) Next:Pan Flaming Head Self Drilling Screw(Pf Screw)