Reaffirmed 2023

NATIONAL FOREWORD

This Indian Standard (First Revision) which is identical with ISO 4161 : 2012 ‘Hexagon nuts with flange, style 2 - Coarse thread’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the General Engineering and Fasteners Standards Sectional Committee and approval of the Production and General Engineering Division Council.

This standard was originally published in 2005 which was based on ISO 4161 : 1999. This revision has been taken up to align it with the latest version of ISO 4161 : 2012.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviation. Certain terminologies and conventions are, however, not identical to those used in the Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as decimal marker, while in Indian Standards, it is current practice to use a point (.) as the decimal marker.