DTI Washer Manufacturer
A high-strength washer specifically designed for pre-tensioned bolted connections. It is tempered and tested to ensure accurate torque control and uniform clamping force in structural applications, providing enhanced safety and reliability.
Fasteners India is a leading DTI Washer Manufacturer in Kolkata, producing Direct Tension Indicator washers that ensure accurate bolt preload verification in critical structural fastening applications. We proudly serve customers across West Bengal, Odisha, Assam, Chhattisgarh, Jharkhand, Bihar, Maharashtra, Telangana, Delhi, Meghalaya, Tamil Nadu, Uttar Pradesh & Karnataka with reliable quality and timely delivery.
- Size : 16mm to 36mm
- Shape : Flower
- Material : C 45
- Color : Black or PLated or Hotdip GI
- Usage/Application – Industrial and bridges
Applications
- Used in high-strength bolted connections for infrastructure.
- Provides torque control in critical applications.
- Ensures precise tension in steel structures.
- Ideal for seismic or heavy-load zones.
Process
- Align the Washer: Place the DTI washer between the bolt and the surface to be fastened.
- Insert the Bolt: Insert the bolt through the washer and into the material.
- Tighten the Fastener: Tighten the bolt until the washer’s deformation is clearly visible, ensuring accurate torque control.
- Verify Installation: Confirm that the washer is properly compressed to achieve correct tension in the bolted connection.
High-Accuracy DTI Washers for Structural Safety
Our DTI washers are engineered to provide visible confirmation of achieved bolt tension, helping reduce installation errors and improving joint reliability in heavy structural and infrastructure projects.
Why Fasteners India Is the Right Choice for DTI Washers
- Consistent tension indication performance
- Uniform protrusion deformation
- High-strength raw material usage
- Strict quality control at every stage
- Reliable supply across Eastern India
- Competitive pricing for project orders
What Is a DTI Washer and How It Works
A DTI (Direct Tension Indicator) washer is a specially designed washer with raised protrusions that compress as the bolt is tightened. When the protrusions flatten to a specified gap, it indicates that the correct bolt tension has been achieved.
Our Manufacturing Approach
Fasteners India follows a precise manufacturing process including material inspection, forming, controlled heat treatment, surface finishing, and final testing to ensure accurate protrusion height and consistent performance in field conditions.
Technical Specifications of DTI Washers
| Specification | Details |
| Size Range | M16 to M36 (Custom sizes available) |
| Washer Type | DTI Washer |
| Material | High Tensile Carbon Steel / Alloy Steel |
| Surface Finish | Black Oxide, Zinc Plated, Phosphated |
| Indication Method | Visual gap / Feeler gauge |
| Standards | IS, ASTM, DIN, ISO |
DTI Washer Size & Dimension Chart
| Bolt Size | Inner Diameter (mm) | Outer Diameter (mm) | Protrusion Height (mm) |
| M16 | 17 | 30 | 0.9 |
| M20 | 21 | 37 | 1.0 |
| M24 | 25 | 44 | 1.2 |
| M30 | 31 | 56 | 1.4 |
| M36 | 37 | 66 | 1.6 |
Custom sizes and protrusion configurations available on request.
Applications of DTI Washers
- Structural steel frameworks
- Bridges and flyovers
- Industrial sheds and buildings
- Power plant structures
- Oil & gas installations
- Railway infrastructure
Industries We Serve
- Construction & Infrastructure
- Engineering & Fabrication
- Power & Energy
- Oil & Gas
- Railways & Transportation
- Heavy Industrial Projects
Quality Standards & Inspection
Each DTI washer manufactured by Fasteners undergoes strict dimensional checks, protrusion height measurement, hardness testing, and surface finish inspection to ensure compliance with project and industry standards.
DTI Washer Supplier in Eastern India
Fasteners India is a trusted DTI washer supplier in Eastern India, delivering consistent quality and timely supply across West Bengal, Odisha, Assam, Chhattisgarh, Jharkhand, Bihar, Maharashtra, Telangana, Delhi, Meghalaya, Tamil Nadu, Uttar Pradesh & Karnataka.
Request Your DTI Washer Quote Today
Looking for a reliable DTI Washer Manufacturer in Kolkata? Fasteners India is ready to support your structural fastening requirements with accurate, durable, and competitively priced DTI washers.