Steel Bar, Cold Drawn Steel Bar, Carbon Steel Rod manufacturer / supplier in China, offering High Strength Thread Stud Bolt ASTM A193 B7 in Petrochemical Industry, 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 and so on.