... HDG etc Size:M16-M64 Use:petrochemistry,metallurgy etcFasteners bolt and nut1.Material:Low-carbon steel,high tensile mid-carbon ... 8,9.8,10.9,12.96.Standard:DIN,ANSI/ASME,BS,GB,JIS,non-standard(DIN933,DIN931,DIN934 etc or BS917 ... 9.8,10.9,12.9 6.Standard:DIN,ANSI/ASME,BS,GB,JIS,non-standard(DIN933,DIN931,DIN934 etc or BS917 ... NO.2,Tariff-freeZone,Qingdao,Shandong,China. good quality hex bolts and nuts