IS 1367 : Part 16 : 2002/ISO 8991 : 1986 Technical Supply Conditions for Threaded Steel Fasteners - Part 16 : Designation System for Fasteners (Third Revision)

NATIONAL FOREWORD

This Indian Standard (Part 16) (Third Revision) which is identical with ISO 8991:1986 ‘Designation system for fasteners’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Bolts, Nuts and Fasteners Accessories Sectional Committee and approval of the Basic and Production Engineering Division Council.

This standard was originally published in 1961 and subsequently revised in 1967 and 1979. This revision of the standard has been taken up to align it with ISO 8991:1986 by adoption under dual numbering system

Designation of various fasteners are also given in product standards. This standard, however, sets out as system of sequence of designation for standard fasteners. Such a designation would assist in ordering requirements of fasteners even for those for which designations are not already covered in product standard.

The text of ISO Standard has been approved as suitable for publication as Indian Standard without deviations. Certain terminology and conventions are, however, not identica~ to those used in Indian Standards. Attention is drawn especially 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”a”decirM marker while in Indian Standards;4he current practice is to use a point (.) as the decimal marker.