... high strength bolt Cover, A325 Tension Control Bolt (T. C Bolt) A449 Tension Control Bolt( T. C Bolt) A490 Tension Control Bolt(T. C 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 ...