... bolts) 1.Material:Stainless steel A2,A4,18-8 steel 2.Standard:ANSI/ASME/EN/IFI 3.size:1/4-1 ... ' Product Specification:Product Name:B18.2.1 Hexagon head bolts(hex bolts)Standard:ANSI/ASME B18 ... .2.1Other standards:GB,DIN,JISB,ISO,ANSI/ASME,Non-standardsSize ... /Go-No go gage and so on. ANSI/ASME B18.2.1 Hexagon head bolts(hex bolts) 1/2-13*2'