BIS-ISI-CERTIFICATE
IS 5187: 1972
Bolts, Nuts & Fasteners - Flush Bolts
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1. Summary about Flush Bolts
Flush bolts are door hardware components used to secure inactive leaves of double doors. They are commonly installed in residential, commercial, and institutional buildings for controlled door operation.
2. Why BIS Certificate is Mandatory for Flush Bolts
BIS certification is mandatory to ensure strength, smooth operation, and durability. Inferior flush bolts can jam, break, or compromise door safety.
3. What is BIS Certified for Flush Bolts
BIS certification confirms compliance with Indian Standards covering material strength, dimensional accuracy, surface finish, and operational reliability.
Tests required for Flush Bolts
| Title | Mandatory/Optional |
|---|---|
| Raw Material | Optional |
| Manufacture and Construction | Required |
| Dimensions | Required |
| Workmanship and Finish | Required |
| Thickness | Required |
| Quality of sealing | Optional |
| Colour and appearance | Required |
| Corrosion resistance | Required |
| Required | Required |
| Resistance to crazing by deformation | Required |
| Fastness to light | Optional |
| Light reflection properties | Optional |
| Required | Optional |
4. Benefits of BIS Certification for Flush Bolts
- Ensures smooth and reliable door locking
- Mandatory for compliant building hardware
- Improves durability under repeated use
- Reduces risk of hardware failure
- Enhances acceptance in construction projects
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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