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DIN6923 Hex Flange Nut Product Description: The din6923 hex flange nut has a larger load bearing surface. The difference between hex flange nut and the ordinary nut is that a larger flange plane is designed under the nut and is integrated with the nut, and no washer is required during assembly. Easy installation. It is mainly used for pipe connections or workpieces that need to increase the nut contact surface.