Stud bolts (threaded rods) and hex bolts: a) Material: ASTM A193 B7,A320 L7, ASTM A307, ASTM A325, A490, ASTM B150 C63000, Duplex SS31803 b) Specification: UNC, UNF ANSI B1.1, DIN 975 ANSI B18.2.1, ANSI B18.2.6 DIN931