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High Pressure Resistant ASTM SA193-B16 Alloy Steel Heavy Hexagon Bolt with ASME B 18.31.2, Find Details and Price about ASTM B16 Bolt Hex Bolt from High Pressure Resistant ASTM SA193-B16 Alloy Steel Heavy Hexagon Bolt with ASME B 18.31.2 - Heti Metals Co., Ltd