Stainless steel tower bolts are locking hardware used on doors, windows, and cabinets.
They help in securing doors by sliding a metal bolt into a fixed socket, keeping them
closed and locked. These bolts are commonly used in homes, offices, and commercial
spaces because they are strong, corrosion-resistant, and easy to operate.
To ensure quality and safety, the Bureau of Indian Standards (BIS) has set IS
15833:2009, which defines the requirements for stainless steel tower bolts in India. This
standard ensures that the product meets proper strength, durability, and finish quality
before being sold in the market.
Who Needs BIS Certification for Steel Tower Bolts?
- Manufacturers (India): Must obtain BIS certification if stainless steel tower bolts
are covered under a QCO
- Foreign Manufacturers: Need certification to export tower bolts to India
- Importers/Brand Owners: Must ensure the products are BIS certified before selling in the Indian market
-
Sellers/Distributors: Should only deal in BIS-certified tower bolts
Certification is regulated by the Bureau of Indian Standards under IS 15833:2009.
What is IS 15833:2009?
This is an Indian Standard issued by the Bureau of Indian Standards that defines the
requirements for steel tower bolts. It explains how these hardware fittings should be
manufactured, tested, and checked before being sold in India.
This standard ensures that stainless steel tower bolts:
- Have proper strength for locking doors and windows
- Are resistant to rust and corrosion
- Work smoothly for regular daily use
- Meet required quality and finish standards
Testing and Inspection Requirements for Tower Bolts
To ensure proper quality, strength, and smooth performance of steel tower bolts, the
standard defines testing and inspection requirements. These tests are carried out during
manufacturing and routine quality checks as per guidelines of the Bureau of Indian
Standards (BIS).
What are R and S?
- R (Required): Test must be done in the factory as part of regular quality checks
- S (Subcontracting Allowed): Test can be done in a BIS-recognized or
accredited external laboratory
Material Checks
- Sheet Material Check (R) – Ensures stainless steel sheet meets IS 6911
requirements
- Bolt Material Check (R) – Ensures bolt material meets IS 6527 requirements
Manufacturing & Construction Checks
- Manufacture Check (R) – Ensures proper production process and assembly
- Design & Workmanship (R) – Checks proper finishing and construction quality
Dimension & Size Tests
- Dimension Check (R) – Verifies length, diameter, and size as per the standard
- Tolerance Check (R) – Ensures accurate fitting and proper alignment
Finish & Surface Quality
- Surface Finish Test (R) – Checks smoothness and overall appearance
- Corrosion Resistance Test (S) – Ensures resistance to rust (if required by
buyer)
process for bis certification

The BIS
certification process for Stainless Steel Tower Bolts 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 15833 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
|
Foreign manufacturers must additionally appoint an Authorized Indian Representative (AIR) to coordinate with the Bureau of Indian Standards (BIS) and manage compliance requirements in India.
Marking Requirements & License Validity
Marking Requirements:-
When a manufacturer obtains the BIS license, the ISI mark for hair clippers and trimmers 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.
Note:
Marking is typically applied using durable stamping, tagging, or permanent printing to ensure clear identification during handling, storage, and transportation, as per BIS marking requirements.
Validity of BIS licenses for tower 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.
Cost of BIS certification for steel tower bolts

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 Charges | 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. |
Note:Additional costs such as pre-testing or factory pre-inspection may apply. The total cost may vary depending on product type, testing requirements, and current BIS guidelines.
To Know The Process in Detail, Please Visit:-
Under BIS Registration Products ISI and CRS
Conclusion
The BIS certification for stainless steel tower bolts as per IS 15833:2009 ensures that the
products meet the required Indian standards for quality, strength, and durability. It
confirms that tower bolts are properly tested and are suitable for safe and long-term use
in doors, windows, and furniture fittings.
With the support of an experienced BIS consultant like EVTL India, manufacturers can
complete the certification process easily, avoid compliance issues, and get faster
approval to sell their products in the Indian market.