... Inch.size: Gr2, Gr5,Gr8, A307Surface: SELF COLOUR, BLACK,ZP,YZP,H.D.G, DACROMENTMaterials:high quality carbon steel ... and harmful defect on bolt and nut5-Surface dealing : Black, Grey(phosphated, Parkerising)6- Thread standard : Thread length ... , ASTM, IFI, JIS, ASThreadMetric, UNC, UNF, BSWFinishPlain, Galvanized, Black, Nickel, Chrome, H.D.GPackingCarton, Box, Bag, PalletQuality AssuranceISO 9001Our ...