Steel Bar, Cold Drawn Steel Bar, Carbon Steel Rod manufacturer / supplier in China, offering A193 B7 B7m B8 L7 Stud Bolts with Black and Zinc Finish, Petrochemical Industry Parts, Thread Stud Bolt ASTM A193 Gr. B7 / A194 Gr. 2h W, ASTM A193 B7 B7m B8 B8m B16 Alloy Heavy Bolts and so on.