... , DIN931, DIN933, DIN558, DIN960, DIN961, DIN558, DIN6914, ASME B 18.2.1, IFI-14, DIN580, ASME B18.15, DIN939, IFI ... , DIN6914, ASTM A325, ASTM A 490, DIN571, ASME B 18.2.1,ASTM A394,DIN 6914, ASTM A325, ASTM A490 ... , ISO4017, ASME B 18.2.1 etc.UsesA bolt is a cylindrical threaded fastener ... (qingdao Office):NO.2,Tariff-freeZone,Qingdao,Shandong,China. metal bolts and nuts