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BS EN 1663 Standard Dimensions for

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Self-locking hex flange nuts with non metallic insert

This standard (BS EN 1663) defines characteristics of self-locking hex flange nuts (with non metallic insert) 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 and 10.

This standard (DIN 1666 and equivalents) defines characteristics of self-locking hex flange nuts (with non metallic insert) and metric fine pitch thread with nominal diameter D from 8 mm to inclusive 20 mm, product grade A for thread up to 16 mm and product grade B for thread larger than 16 mm, strength classes 6, 8 ans 10.

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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