... 1.Good quality,competitve price. 2.Many types. boltBolts and Nuts Fasteners bolt and nut Material:carbon or alloy steel Surface ... DIN,ANSI/ASME,BS,GB,JIS,non-standard(DIN933,DIN931,DIN934 etc or BS917 etc or ASME B18.2.1 etc ... DIN,ANSI/ASME,BS,GB,JIS,non-standard(DIN933,DIN931,DIN934 etc or BS917 etc or ASME B18.2.1 etc ... Office):NO.2,Tariff-freeZone,Qingdao,Shandong,China. good quality hex bolts and nuts