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BIS-ISI-CERTIFICATE

IS 4621:1975

Bolts, Nuts & Fasteners - Indicating Bolts for use in public baths and lavatories

Bolts, Nuts & Fasteners - Indicating Bolts for use in public baths and lavatories
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1. Summary about Indicating Bolts for Use in Public Baths and Lavatories

Indicating bolts are specialized fasteners used in sanitary fittings to indicate occupied or vacant status in public baths and lavatories. They are designed for smooth operation, corrosion resistance, and frequent public use.


2. Why BIS Certificate is Mandatory for Indicating Bolts

BIS certification is mandatory to ensure durability, corrosion resistance, and functional reliability in hygienic public environments where frequent usage is expected.


3. What is BIS Certified for Indicating Bolts

BIS certification verifies compliance with Indian Standards covering material quality, corrosion resistance, dimensional accuracy, and functional performance.


Tests required for Indicating Bolts for Use in Public Baths and Lavatories

TitleMandatory/Optional
Raw Material

Optional

Dimensions

Required

Manufacture

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 Indicating Bolts

  • Ensures reliable operation in public facilities
  • Mandatory for regulated sanitary installations
  • Improves corrosion and wear resistance
  • Reduces maintenance and replacement needs
  • Builds confidence among authorities and users