Hex Bolts 4.8/8.8/10.9/12.9/A2/A4 Handan Yuanbo Metal Products Corporation Limited Base Info Material:Carbon SteelType:Hexagon HeadConnection:Common BoltHead Style:HexagonalStandard:DIN, ANSI, GB, JISGrade:8.8Application:BuildingFinish:Black Description Pre:Optical Screw (CES011) Next:Blanking Flange/Vacuum Flange