BIS Certification for Indicating Bolts for Use in Public Baths and Lavatories IS 4621: 1975

Indicating bolts are simple locking devices used in public bathrooms and lavatories to show whether the door is occupied or vacant. These bolts help improve privacy and convenience by clearly indicating the usage status from outside, making them commonly used in public places like malls, offices, and railway stations. To ensure the quality, durability, and proper functioning of these products, the Bureau of Indian Standards (BIS) provides certification as per IS 4621:1975. This certification ensures that indicating bolts are manufactured with proper materials, accurate design, and reliable performance for long-term use.

they offer excellent resistance to wear and corrosion, making them suitable for high-traffic environments. These bolts combine utility and aesthetic appeal, enhancing user convenience while maintaining hygiene and security in public facilities.

what is is 4621:1975

IS 4621:1975 is the Indian Standard for indicating bolts. It is a standard set by the Bureau of Indian Standards (BIS) to ensure these products are reliable and are of good quality for regular use.

This standard ensures that the indicating bolts are:

Reliable in indicating occupancy (vacant/engaged)
Strong enough for regular use in public places
Resistant to wear and environmental conditions
Smooth and easy to operate
Durable for long-term usage without frequent failure
Consistent in size, design, and manufacturing quality

Testing and Inspection Requirements for Indicating Bolts

To ensure proper performance and efficient operation of these bolts, the Bureau of Indian Standards (BIS) has defined clear testing and inspection requirements, which are carried out during manufacturing.

What are R and S?

R (Required): Test must be done in the manufacturer’s own laboratory
S (Subcontracting Allowed): Test can be done in a BIS-approved or external laboratory

Physical and Quality Tests

Visual Appearance Test (R) – Ensures bolts are free from defects, cracks, or surface damage
Dimension Test (R) – Checks correct size and design as per standard
Workmanship and Finish Test (R) – Ensures smooth operation and proper finishing

Material Tests

Raw Material Quality Test (S) – Ensures materials like brass, aluminum, or zinc alloys meet required standards
Manufacturing Quality Check (R) – Verifies proper construction and assembly of components

Performance and Functional Tests

Operation Test (R) – Ensures smooth functioning of gear/displacement mechanism
Indication Accuracy Test (R) – Confirms correct display of occupied/vacant status
Durability Test (R) – Ensures long-term performance under repeated use

Surface and Coating Tests (For Aluminum Bolts)

Anodizing Thickness Test (R) – Ensures proper coating thickness
Colour and Appearance Test (R) – Verifies uniform finish and visual quality
Corrosion Resistance Test (R) – Ensures resistance to rust and environmental conditions
Abrasion Resistance Test (R) – Checks resistance to wear (if required)
Resistance to Crazing Test (R)—Ensures coating does not crack under stress
Fastness to Light Test (S) – Ensures color stability under light exposure
Light Reflection Test (S) – Checks visibility and clarity of indication

process of bis certification

The BIS certification process for Indicating Bolts for Use in Public Baths and Lavatories involves multiple steps, designed to thoroughly evaluate a product's compliance with the required standards. Here is a general overview of the certification process:

Online Registration: Manufacturers register on the BIS Manak Online Portal by submitting company details, factory information, and product specifications. Foreign manufacturers must appoint an Authorized Indian Representative (AIR) in India.
Testing at BIS-Approved Laboratory: Product samples are tested in BIS-approved laboratories to evaluate electrical safety, insulation resistance, heating efficiency, durability, and overall performance as per requirements.
Application Submission: The application is submitted along with laboratory test reports, technical documents, manufacturing process details, and factory information. Foreign manufacturers must also provide AIR-related documents.
Factory Inspection: BIS officials conduct an on-site inspection of the manufacturing unit to verify production processes, quality control systems, safety measures, and compliance with the standard.
Grant of BIS License: If all requirements are successfully met, BIS issues the certification license under Scheme-I, allowing the manufacturer to produce and sell certified products.
Use of ISI Mark: After certification approval, the manufacturer is permitted to use the ISI mark along with a CM/L number on the product, confirming compliance with the standard.

Documents Required for IS 4621 Certification

The following documents are typically required for obtaining BIS certification:

Basic Details	GST Certificate Email ID & Contact Number Factory & Office Address Rent Agreement / Lease Deed (if applicable)
Legal Documents	Partnership Deed (if partnership firm)
Manufacturing Details	List of machinery Process flow chart Layout Plan of Factory
Raw Material Details	List of Raw Materials Supplier Details Raw Material Invoices Raw Material Test Certificates
Testing & Quality Control	List of Testing Equipment Calibration Certificates QC / Lab In-charge Appointment Letter & Qualification
Production Details	Annual Installed Capacity Last Year Production Value
Product & Packaging Details	Quantity per Package Nature of Packing Nature of Printing / Marking on Product
Management Details	Top Management Details Concerned Person for BIS Communication
Brand & Certification Documents	Trademark / Brand Certificate Consent Letter from BIS Recognized Laboratory
Additional Documents	Weekly Off Details Hygiene Document (if applicable) Relaxation Letter (if applicable) Any Other Relevant Document

Marking Requirements & License Validity

Marking Requirements

When a manufacturer obtains the BIS license, the ISI mark for indicating bolts must be applied clearly and permanently on the product or its packaging. In addition to the ISI Mark, other important details must also be provided on the product or packaging, as specified in the table below. This ensures the product meets all quality and safety standards.

ISI Mark	Indicates that the product is BIS certified and follows to the standard
Standard Number	IS 4621
CML Number	Certification Marks Licence (CML) number issued by BIS
Manufacturer Details	Name of manufacturer or registered trademark
Alloy Information	Grade or designation of aluminium alloy used
Batch / Date	Batch number, heat number, or manufacturing date for traceability

Validity of BIS licenses for indicating bolts

After obtaining BIS certification for the product, the license is valid for a fixed period and must be maintained by following BIS rules and standards.

Particulars	Details
Initial Validity	Typically 1 to 2 years, depending on BIS approval conditions
Renewal	Must be renewed before expiry by submitting the application along with the prescribed fee and updated documents
Surveillance	Includes periodic factory inspections and market sample testing conducted by BIS
Compliance	Continuous following to standard and applicable Quality Control Orders (QCOs) is mandatory
Risk	Non-compliance or failed sample testing may lead to suspension or cancellation of the BIS license

cOST AND TIMELINE OF CERTIFICATION

BIS ISI Mark Certification Costing And Timeline

The cost of BIS certification includes charges for application, inspection, license, testing, and marking. These fees are paid to BIS as per Scheme I guidelines.

Cost Breakdown

Indian Manufacturers

No.	Major Charges	Particulars	Amount	Remark
1	BIS Fees	Application Fee	INR 1,000	—
		Audit / Inspection Fee	INR 7,000	—
		License Fee	INR 1,000	—
		Marking Fee	Depends on product	Discount as per MSME
2.	Testing Charges	Sample Testing Fee	As Applicable	Payable to a BIS-approved laboratory.
3.	EVTL India Service Fee	Consultancy & Support	As per actual	Depends on product type and factory location.

Foreign Manufacturers

No.	Major Charges	Particulars	Amount	Remark
1.	BIS Fees	Application Fee	USD 15	Payable via SWIFT to BIS. SAARC countries can pay INR with 18% GST.
		Audit Charges	USD 3,200 – 5,900	Depend on Country
		License Fee	USD 15	—
		Marking Fee	Depends on product	—
2.	Testing Charges	Sample Testing Fee	As Applicable	Payable to a BIS-approved laboratory.
3.	EVTL India Service Fee	Consultancy & Support	As per actual	Based on product and manufacturing location.

to know the process in detail, please visit:

Under BIS Registration Products ISI and CRS

conclusion

The BIS certification for indicating bolts used in public baths and lavatories, as per IS 4621:1975, ensures that the product meets the required standards of quality, durability, and performance for reliable use in public spaces. It also ensures that the bolts are properly tested for material strength, smooth operation, finishing, and resistance to wear, which make them suitable for frequent use while maintaining proper functionality.

With the support and guidance of an experienced BIS consultant like EVTL India, manufacturers can complete the certification process smoothly, reduce errors, and obtain faster approval for their products.