Hex bolt, Hexagon Head Bolt, Fastener ANSI B18.2.1, BSW 1/4 ... 1-1/2" Carbon Steel,Alloy Steel Hex bolts, Hexagon Head Bolts, FastenersCertificate:ISO9001;2000Product name:Hex Bolts ,Hexagon Bolts, ... Hex Head BoltsMetric Standard:ANSI B18.2.1, BSWWe also could produce ... ' requirement hex bolt ansi b.2.1 automatic nail making machine