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ISO 4161 Standard Dimensions for

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Hexagon nuts with flange

This standard (ISO 4161) defines characteristics of hexagon nuts with flange, with thread from M5 to M20, product grade A for thread up to M16 and product grade B for thread larger than M16 and with strength classes 8, 10, 12 and A2-70. The norm is not equivalent to ISO 4161: the key for the nominal size M10 is 16mm in the standard DIN 1661 and 15mm in the standard ISO 4161.

Dimensional Drawing and Technical Diagrams

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Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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