BIS Certification for Hexagon Head Bolts, Screws and Nuts of Product Grade C Hexagon Head Bolts (Size Range M5 To M64) under IS 1353 (Part-1)

BIS CERTIFICATION FOR HEXAGON HEAD BOLTS, SCREWS AND NUTS OF PRODUCT GRADE C HEXAGON HEAD BOLTS (SIZE RANGE M5 TO M64) IS 1363 (PART 1) : 2019

Hexagon head bolt grade C is hex bolt with low mechanical property and large tolerance on dimension. Also partial threaded with shank, grade C hex head bolt do not apply to applications which require precise assembly, it always matchs with grade C hex nut.

Hex bolts, also called hexagon screw head bolts, hex cap bolts, hex-cap screws, or machine bolts, are a very common choice when it comes to construction and repair. Hexagon screw head bolts come in a large variety of sizes and diameters.

Hex Cap Screws vs Hex Cap Bolts

The terms “hex cap screw” and “hex cap bolt” are often used synonymously when describing a threaded fastener with a hexagonal head. With that said, bolts are typically designed to be used with one or more nuts, whereas screws are not. Some screws can also create their own threading during installation. In comparison, bolts must be installed into the existing threading of a machine or object. Even with these nuances, many people use the terms “hex cap screw” and “hex cap bolt” interchangeably.

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.

Hexagon head bolts, screws and nuts of product grade c hexagon head bolts (size range M5 to M64) product has been specified in IS 1353(Part 1) : 2019 by Bureau of Indian Standards.

NATIONAL FOREWORD

This Indian Standard (Part 1) (Fifth Revision) which is identical with ISO 4016 : 2011 ‘Hexagon head bolts — 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.

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Following are the Testing Parameters :

·       Dimensions

·       Thread and Tolerances

·       Mechanical Properties

·       Finish – Coating as per clause 4

·       Tensile Test

·       Proof Load Test

·       Head Soundness test

·       Torsion test

·       Impact test

·       Hardness test

·       Decarburization Test

·       Carburization Test

·       Surface Discontinuity Inspection

·       Electroplating

·       Non-electrolytically applied zinc flake coating

Hex Head Bolts are not Hex Cap Screws 

Mistaking a hex cap screw for a hex bolt is very common, but the two fasteners differ in many ways, including how they are used and installed.

• Hex bolts are installed by turning a nut to tighten the fastener.
  Hex cap screws are installed into tapped holes by turning the head to assemble and tighten.
  
  
• Hex bolts have neither the washer face nor chamfered point.
  Hex cap screws feature a washer face on the bearing surface and the chamfered point.
  
  
• Hex bolts are often used in the construction industry, where mechanical properties are more critical than dimensional tolerances.
  Hex cap screws are commonly used for precision applications where tight tolerance is required.

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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