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Factory of ANSI/ASME B 18.2.1 ASTM A307 A449 A354 SAE J429 Gr 2/5/8 Hex Bolts/Screw with Black Finish, Find Details and Price about Bolt and Nut Bolt Nut from Factory of ANSI/ASME B 18.2.1 ASTM A307 A449 A354 SAE J429 Gr 2/5/8 Hex Bolts/Screw with Black Finish - Ningbo Teng Qi Fasteners Co., Ltd.