BIS-ISI-CERTIFICATE
IS 1363 (Part 3) :2018
Bolts, Nuts & Fasteners - Hexagon Head Bolts, Screws and Nuts of product Grade C – Hexagon Nuts (Size Range M5 to M64)
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1. Summary about Hexagon Head Bolts, Screws and Nuts of Product Grade C – Hexagon Nuts (M5 to M64)
Grade C hexagon nuts are general-purpose nuts used with bolts and screws in mechanical and structural assemblies. They are suitable for applications with moderate load requirements.
2. Why BIS Certificate is Mandatory for Grade C Hexagon Nuts
BIS certification is mandatory to ensure thread accuracy, hardness, and load-bearing capability. Inferior nuts can loosen or strip threads, leading to joint failure.
3. What is BIS Certified for Grade C Hexagon Nuts
BIS certification verifies compliance with Indian Standards covering dimensions, thread tolerances, mechanical properties, and surface finish.
Tests required for Grade C Hexagon Nuts (M5 to M64)
| Title | Mandatory/Optional |
|---|---|
| Dimensions | Required |
| Material | Optional |
| Threads requirement | Required |
| Stress under proof load | Required |
| Hardness Test | Required |
| Surface Integrity inspection | Required |
| Electroplating | Required |
| Non - Electrolytically applied zinc flake coating | Required |
4. Benefits of BIS Certification for Grade C Hexagon Nuts
- Ensures secure and reliable fastening
- Mandatory for compliant industrial use
- Improves interchangeability with bolts
- Reduces risk of loosening and failure
- Builds trust among manufacturers and users
Disclaimer.
The contents of this update are provided for general informational purposes only and do not constitute legal advice. Readers are encouraged to consult with professional legal counsel before taking action based on this information.
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