Flat Head Self Drilling Screw Hangzhou Huachao Fastener Co., Ltd. Base Info Material:Carbon SteelShape of Head:FlatSurface Finishing:Zinc PlatedCertification:ISOCustomized:CustomizedTrademark:hangchaoOrigin:China (Mainland)HS Code:73181400 Description Pre:DIN 965 Cross Recessed Countersunk Flat Head Stainless Steel Screw Next:Supanchor R32n Hollow Anchor Rock Bolt Drill Rod for Underground Mining