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Hex Flange Bolt with DIN6921/DIN6922 ASME 18.2.3.4m Manufacturer 20 Years, Find Details and Price about Flange Hex Bolt Hex Bolt from Hex Flange Bolt with DIN6921/DIN6922 ASME 18.2.3.4m Manufacturer 20 Years - Ningbo Strong Bolt Trade Co., Ltd.