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BIS-ISI-CERTIFICATE

IS 1364 (Part 1) :2018

Bolts, Nuts & Fasteners - Hexagon Head Bolts, Screws and Nuts of product Grades A and B – Hexagon Head Bolts (Size Range M 1.6 To M 64)

Bolts, Nuts & Fasteners - Hexagon Head Bolts, Screws and Nuts of product Grades A and B – Hexagon Head Bolts (Size Range M 1.6 To M 64)
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1. Summary about Hexagon Head Bolts of Product Grades A and B (Size Range M1.6 to M64)

Grade A and B hexagon head bolts are precision fasteners used in applications requiring tighter tolerances and higher reliability. They are commonly used in machinery, automotive, and high-quality structural assemblies.


2. Why BIS Certificate is Mandatory for Grade A and B Hexagon Head Bolts

BIS certification is mandatory to ensure precise dimensions, superior mechanical properties, and consistent performance. Failure of these fasteners can result in serious mechanical or structural issues.


3. What is BIS Certified for Grade A and B Hexagon Head Bolts

BIS certification confirms compliance with Indian Standards through testing of dimensional tolerances, tensile strength, hardness, and thread accuracy.


Tests required for Grade A and B Hexagon Head Bolts (M1.6 to M64)

TitleMandatory/Optional
Material (Mechanical Properties)

Optional

Dimensions

Required

General Requirements

Required

Thread requirements

Required

Tolerances

Required

Electroplating

Required

Non - Electrolytically applied zinc flake coating

Required

Hot dip galvanized

Required

Surface Integrity

Required


4. Benefits of BIS Certification for Grade A and B Hexagon Head Bolts

  • Ensures high-precision fastening
  • Mandatory for critical engineering applications
  • Improves joint reliability and safety
  • Reduces rejection in quality inspections
  • Enhances confidence of OEMs and regulators