Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 1) (Sixth Revision) which is identical with ISO 4014 : 2022 ‘Hexagon head bolts - Product grades A and B’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the General Engineering and Fasteners Standards Sectional Committee and approval of the Production and General Engineering Division Council.

IS 1364 was originally published in 1960 and first revised in 1967. Subsequent to the publication of 1967 edition, many changes had been agreed upon at international level which have been reflected in IS 1367 series of standards covering ‘Technical supply conditions for threaded steel fasteners’. Accordingly, second revision was published in 1983 splitting the standard into 5 parts covering hexagon head bolts, hexagon head screws, hexagon nuts, hexagon thin nuts (chamfered) and hexagon thin nuts (unchamfered). Further in 2002, Part 6 was published on ‘Hexagon nuts, style 2 - Product grades A and B’.