Bolts,fastener,hex bolts Features: Stud bolts (threaded rods) and hex bolts a) Material: ASTM A193 B7,A320 L7, ... ASTM A3 Bolts,fastener,hex boltsFeatures: Stud bolts (threaded rods) and hex bolts a) Material: ASTM A193 B7,A320 L7 ... A307, ASTM A325, A490, ASTM B150 C63000, Duplex SS31803b) Specification: UNC,UNF ANSI B1.1,DIN 975 ANSI B18.2.1 ...