... standard: ASTM F1852, F2280, GB3632-3633,ect.4)Surface treatment: plain, black (oxide), zinc plated(yellow or white zinc plated), galvanzied, hot ... , ANSI, ASME, ASTM, IFI, JIS, ASThreadMetric, UNC, UNF, BSWFinishPlain, Galvanized, Black, Nickel, Chrome, H.D.GPackingCarton, Box, Bag, PalletQuality AssuranceISO 9001 ...