hex bolts 1.Standards:DIN933 DIN931 ANSI/ASME B18.2.1 GB5783 ... ,black,ZB,ZBK,ZY,ZW,Sil Plat,Nic Plat, hex bolts DIN9331.Standards:DIN933 ANSI/ASME B18.2.1 GB57832.Diameter ... -M36 1/4''-1'' 3.Length: 6-300 1/2''-8'' 4.Finish:natural color,black,ZB,ZBK,ZY,ZW,Sil ... according to customer requirements.5.Grade: grade2 grade5 class4.8 5.8 6.8 8.86.packing:25kg/carton,bulking,36carton/pallet 4 boxes ...