Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 2) (Sixth Revision) which is identical with ISO 4018 : 2022 ‘Hexagon head screws - Product grade C’ 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 1363 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, the second revision was published in 1984 splitting the standard into 3 parts covering hexagon head bolts, hexagon head screws and hexagon nuts. The third, fourth and fifth revision of this standard were published to align them with latest versions of ISO 4018. The sixth revision of this standard has been undertaken to align it with ISO 4018 : 2022.