DIN7982 CSK Head Self tapping screw(flat head) Hangzhou Huachao Fastener Co., Ltd. Base Info Material:Carbon SteelShape of Head:FlatSurface Finishing:Zinc PlatedCertification:ISOCustomized:CustomizedTrademark:HANGCHAOOrigin:CHINAHS Code:731814000 Description Pre:Supanchor T40/20 Tunneling Construction Sda Hollow Drilling Coal Mine Rock Anchor Roof Bolt Next:Asme B 18.10 Track Bolt with Heavy Square Nut Black