Flat Head Self Dilling Screw (DIN7504P) Hangzhou Huachao Fastener Co., Ltd. Base Info Model NO.:DIN7504NMaterial:SteelSurface Finishing:Zinc PlatedCertification:ISO, GS, RoHS, CEPerformance:Eco-FriendlyCustomized:Non-CustomizedTrademark:HANGCHAOOrigin:ChinaHS Code:73181500 Description Pre:Supanchor T52 Sda Hollow Drilling Roof Rock Anchor T Threaded Bar Next:DIN7504-P CSK Head self drilling screw