1.According to Standard drawings 2.ROHS,DIN,ISO;STAM standard 1.NameCarbon Steel Zinc plated Hexagon Bolt2.standardDIN931/933 DIN912, ASTM,JIS,BS,Nonstandard bolt(according to your order),etc3.MaterialCarbon Steel,low carbon steel; medium carbon steel(1035/1045);Alloy carbon steel,ect4.Class4.8;6.8;8.8;10.9;12.9;Gr2,5,8;A194 2H5.FinishZinc plated(Cr,6+);,Black,hot dipped galvanized; dacromet6. ...