China ASTM A193 B7 / B7m / B16 Thread Rods (Stud Bolts) with Teflon, PTFE (Xylan), Find details about China Thread Rods, Stud Bolt from ASTM A193 B7 / B7m / B16 Thread Rods (Stud Bolts) with Teflon, PTFE (Xylan)