... demand side Steel-structured high-strength torsion components for bolted connections with CE certifation 1.high strength track shoe bolt ... A307Surface: SELF COLOUR, BLACK,ZP,YZP,H.D.G, DACROMENTMaterials:high quality carbon steel (C1015,C1035,C1045etc)Alloy ... , UNF, BSWFinishPlain, Galvanized, Black, Nickel, Chrome, H.D.GPackingCarton, Box, Bag, PalletQuality AssuranceISO 9001Our bolts and assembly ...