... insulator, bushing etc.Stainless Steel Hex bolts nuts washers High strength HDG bolt 10.9s1.Materials: low carbon alloy ... steel tower masts and other friction-link project. I bolt steel companies choosing the material quality, production, advanced technology ... 10.9StandardDIN, ANSI, ASME, ASTM, IFI, JIS, ASThreadMetric, UNC, UNF, BSWFinishPlain, Galvanized, Black, Nickel, Chrome, H.D.GPackingCarton ...