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ASTM A193 B8 B8m Zinc Plated Galvanized threaded steel rod B7 M3-M120 Steel Threaded Rods ASTM A193 B8 B8m/Zinc Plated Galvanized B7/M3-M120 DIN975 DIN976 Steel China ASTM A193: B7, B7M, B16, B8 class ...