Fit Bolt Manufacturer
Fasteners India is a trusted Fit Bolts manufacturer based in Kolkata, providing high-accuracy fastening solutions across West Bengal, Odisha, Assam, Chhattisgarh, Jharkhand, Bihar, Maharashtra, Telangana, Delhi, Meghalaya, Tamil Nadu, Uttar Pradesh & Karnataka. Our Fit Bolts are engineered for close tolerance applications where precise alignment and strong load transfer are essential.
Our Manufacturing Capability
Fasteners India operates a modern production facility equipped with CNC turning centers, precision grinding machines, thread rolling units, controlled heat treatment systems, and advanced inspection equipment. Every Fit Bolt is manufactured under strict quality control to ensure dimensional accuracy and consistent performance.
What Are Fit Bolts?
Fit bolts, also known as close tolerance bolts, are designed to provide a snug fit in reamed or precision-drilled holes. They are commonly used where shear load transfer, alignment, and rigidity are critical.
Performance Advantages:
- Close dimensional tolerances
- High shear strength
- Excellent load distribution
- Reduced movement and vibration
- Long service life in demanding applications
Fit Bolt Variants We Manufacture
- Close tolerance fit bolts
- Precision ground shank bolts
- High tensile fit bolts
- Structural fit bolts
- Custom fit bolts as per drawings and specifications
Materials & Strength Grades
Our fit bolts are manufactured using:
- Carbon Steel
- Alloy Steel
- Stainless Steel (SS 202, SS 304, SS 316)
Available grades:
- 8, 10.9, 12.9
End-to-End Manufacturing Process
- Selection of certified raw materials
- Precision forging and machining of shank
- Close tolerance grinding for accurate fit
- Thread rolling for superior strength
- Heat treatment for required grade
- Surface finishing and corrosion protection
- Dimensional and mechanical inspection
- Final packaging and dispatch
Technical Specification Chart
Bolt Size | Shank Tolerance | Thread Type | Length Range | Grade | Finish |
M8 | h8 / h9 | Metric | 30 – 150 mm | 8.8 | Black, Zinc plated |
M10 | h8 / h9 | Metric | 40 – 200 mm | 8.8, 10.9 | Black, Phosphated |
M12 | h7 / h8 | Metric | 50 – 250 mm | 10.9 | Black, Phosphated |
M16 | h7 / h8 | Metric | 60 – 300 mm | 10.9, 12.9 | Black, Zinc plated |
M20 | h7 | Metric | 70 – 350 mm | 12.9 | Black, Phosphated |
(Custom sizes, tolerances, threads, and finishes available on request.)
Typical Application Areas
- Heavy machinery and equipment
- Structural steel assemblies
- Power plants and turbines
- Automotive and transport systems
- Industrial tooling and fixtures
- Precision engineering applications
Why Choose Fasteners India for Fit Bolts?
- High-precision in-house manufacturing
- Strict dimensional and strength testing
- Competitive factory-direct pricing
- Bulk production and project supply capability
- Custom specifications and packaging
- Reliable delivery across Eastern and Central India
Supply Network
Fasteners India supplies fit bolts across:
West Bengal, Odisha, Assam, Chhattisgarh, Jharkhand, Bihar, Maharashtra, Telangana, Delhi, Meghalaya, Tamil Nadu, Uttar Pradesh & Karnataka.
Contact Fasteners India Today
For reliable Fit Bolts manufacturing in Kolkata, contact Fasteners India today for quotations, samples, and technical support.