BIS Certification for Hexagon Head Bolts, Screws and Nuts of Product Grade C Hexagon Head Nuts (Size Range M5 To M64) under IS 1363(Part-3)

BIS CERTIFICATION FOR HEXAGON HEAD BOLTS, SCREWS AND NUTS OF PRODUCT GRADE C HEXAGON HEAD NUTS (SIZE RANGE M5 TO M64) IS 1363(PART 3): 2018

A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads' friction (with slight elastic deformation), a slight stretching of the bolt, and compression of the parts to be held together.

The most common shape today is hexagonal, for similar reasons as the bolt head: six sides give a good granularity of angles for a tool to approach from (good in tight spots), but more (and smaller) corners would be vulnerable to being rounded off. It takes only one sixth of a rotation to obtain the next side of the hexagon and grip is optimal. However, polygons with more than six sides do not give the requisite grip and polygons with fewer than six sides take more time to be given a complete rotation. Other specialized shapes exist for certain needs, such as wing-nuts for finger adjustment and captive nuts (e.g. cage nuts) for inaccessible areas.

Hexagon head nuts are six sided general purpose nut with internal screw threads. Hex nuts are one of the most common hexagonal fastener with internal threads that screws on to the shank of a hex head cap screw or other bolts. These nuts are extremely versatile but require a wrench for installation.

BIS is a statutory institution established under the Bureau of Indian Standards Act,1986  to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country.

NATIONAL FOREWORD

This Indian Standard (Part 3) (Fifth Revision) which is identical with ISO 4034 : 2012 ‘Hexagon regular nuts (style 1) — Product grade C’ 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.

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Hexagon head bolts, screws and nuts of product grade c hexagon head nuts (size range M5 to M64) product has been specified in IS 1363 (Part 3) : 2018 by Bureau of Indian Standards.

Following are the Testing Parameters :

·       Dimensions

·       Material

·       Thread Requirements

·       Stress under proof load

·       Hardness

·       Surface integrity inspection

·       Electroplating

·       Non-electrolytically applied zinc flake coating

Identification Marks for Hex and Heavy Hex Nuts

When specified, the mark shall be the grade letter symbol on one face of the nut. Grade C nuts shall be marked on one face with three circumferential marks 120° apart. Grade C3 nuts shall be marked on one face with three circumferential marks 120° apart and the numeral 3.

BIS Certification in India

It is always better to consult with experience team such as ERCS Pvt. Ltd. for smooth certification process.

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