Description of hot dip galvanized bolt and nut 1. Standard: din. Asme, jis, bs, ect. 2.Size: meet customers' demands 3.Grade:8.8. 10.9 12.9 4 .Materail: carbon steel, stainless steel, ect. 5.Surface: plain, black, zinc plated (yellow, blue) 6.Packing: 25kg/carton, bulking, 36carton/pallet 4 boxes/carton, small boxes 36carton/pallet Product details Diameter Length Grade Surface Standard Include M6-m56(1/4"-4") 500mm max. 4.8/5.8/6.8/8.8/10.9/12.9/ Gr2/gr5/gr8 Zinc plated, black, plain, Yzp, hdg, dacromet Din, ansi, uni, jis, iso, bs Din931/933/601/558/960/961/912 Ansi/asme b.18.2.1 Bs1083, ect.