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ISO 4032 is an international standard first issued in 1979 by the International Organization for Standardization. This standard has been revised by ISO 4032:2012 in 2012 and was last reviewed and confirmed in 2017. Therefore ISO 4032:2012 version remains current.

ISO 4032:2012 specifies the characteristics of hexagon regular nuts with threads from M1,6 up to and including M64, with product grade A for threads of diameter less than or equal to M16 and product grade B for threads of diameter greater than M16.