Tower Bolts made
from non-ferrous metals are premium fasteners widely used in residential,
commercial, and industrial applications for securing doors, windows, and
furniture. Crafted from materials like brass, bronze, or aluminum, these bolts
offer superior corrosion resistance, aesthetic appeal, and durability.
To make sure these tower bolts perform well and last long, they need to follow IS 204 (Part 2): 1992, a standard set by the Bureau of Indian Standards. Obtaining BIS certification ensures that the tower bolts have been properly tested and meet all required standards.
What is IS 204 (Part 2):1992
IS 204 (Part 2):1992 is the Indian Standard for non-ferrous tower bolts. It is a standard set by the Bureau of Indian Standards to ensure that these products are durable, properly finished, and suitable for everyday use.
This standard makes sure that the tower bolts are
- Strong enough for regular locking and unlocking use
- Made from good quality non-ferrous materials resistant to corrosion
- Smooth in operation without jamming or friction
- Properly finished for better appearance and long life
- Accurate in size, design, and fitting
Testing and Inspection Requirements for Tower Bolts
To ensure proper performance and quality of these non-ferrous bolts, the Bureau of Indian Standards has defined clear testing and inspection requirements under the standard, which are carried out during manufacturing.
What are R and S?
- R (Required): Test must be conducted in the manufacturer’s in-house laboratory
- S (Subcontracting Allowed): Test can be conducted in a BIS-approved or NABL-accredited external laboratory
Physical and Quality Tests
- Visual Appearance (R) – Ensures tower bolts are free from defects, cracks, or damage
- Dimensions and Size (R) – Checks correct length, thickness, and uniform shape as per standard
- Workmanship (R) – Ensures proper finishing and smooth operation of the bolt
Material Tests
- Raw Material Quality (S) – Confirms materials like brass, aluminium alloy, or zinc alloy meet IS requirements
- Material Compliance Test (S) – Verifies raw material as per relevant IS grades
Manufacturing and Construction Tests
- Manufacturing Check (R) – Ensures proper fabrication and assembly as per IS specifications
- In-Process Quality Control (R) – Verifies consistency during production
Finish and Coating Tests
- Finish Test (R) – Ensures proper surface finish for durability and appearance
- Anodizing Test (R) – Checks coating thickness and quality for aluminium tower bolts
Performance and Functional Tests
- Smooth Operation Test (R) – Ensures easy locking and sliding without jamming
- Fitment Test (R) – Verifies proper fitting and alignment of components
BIS certification process for Non-Ferrous Tower bolts
The BIS certification process ensures that these tower bolts meet the required standard for proper and efficient operation as defined by the Bureau of Indian Standards (BIS).
- 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: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 204 (part 2) 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
| ISI Mark | Indicates that the product is BIS certified and follows the standard |
| Standard Number | IS 204 (part 2) |
| CML Number | Certification Marks License number issued by BIS |
| Manufacturer Details | Name of manufacturer or registered trademark |
| Batch / Date | Batch number or manufacturing date for traceability |
Validity of BIS licenses for non-ferrous tower bolts
Cost of BIS certification for 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.
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.
Conclusion
BIS certification for tower bolts made from non-ferrous metals, as per IS 204 (Part
2):1992, ensures that the product meets all required quality parameters and
performance standards for proper locking applications. It guarantees that the tower bolts
are properly tested for dimensions, finish, smooth operation, and resistance to
corrosion, making them reliable for long-term use in doors, windows, and furniture.
With the support and guidance of an experienced BIS consultant like EVTL India,
manufacturers can complete the certification process smoothly, reduce errors, and
obtain approval faster for market compliance.
