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DIN EN 1661 Hexagonal flange nuts
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Ｑ320 Hexagonal flange nuts
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Non-standard flange nuts with large flange
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DIN6923 flange nuts without serrations
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GB6177 High strength hardened black flange nuts
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JIS1190 Japanese standard flange nuts
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IFI-145 Flange nuts with serrations
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DIN6331 Hexagon collar nuts with a height of 1.5 d
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Non-standard high strength thin flange nuts