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Carbon Steel/Galvanized DIN933 DIN931 ASTM A325 A490 B7 B8 High Strength Heavy Hex Head Bolt, Find Details and Price about Bolt Hex Head Bolt from Carbon Steel/Galvanized DIN933 DIN931 ASTM A325 A490 B7 B8 High Strength Heavy Hex Head Bolt - Jiaxing Haina Fastener Co., Limited