... type high strength bolts for steel structureMaterialAlloy steel ,carbon steel, stainless steel etc.SizeM16-M30Length40mm-200mmTensile ... IFI, JIS, ASThreadMetric, UNC, UNF, BSWFinishPlain, Galvanized, Black, Nickel, Chrome, H.D.GPackingCarton, Box, ... AssuranceISO 90012.large hexagon head bolt Steel structure hexagon head bolts TypeGradeMaterialSpecificationHardnessstandardSurfaceBolt10.9S20MnTiBM12- ...