... .surface:black, plain, zinc plated 2.high strength and corrosion resistance 3.high quality high strength bolt with best quality,black, plain or zinc ... requirement4.standard:DIN ,ANSI/ASME,BS,GB,JIS,Non-standard5.high strength and corrosion resistance6.much lighter than the alloy ones4 ... on pallet or small box or according to customers requirement high strength bolt with best quality,black surface