Flange Bolt Manufacturer
Our Flange Bolts are engineered to provide secure load distribution, vibration resistance, and long-term performance in industrial and construction applications. Fasteners India is the premier manufacturer of Flange Bolts in India. We, at Fasteners India , offer Flange Bolts in various sizes and standards. Additionally, J Bolts are available in a range of materials and grades. Fasteners India is a trusted Flange Bolts manufacturer based in Kolkata, delivering high-strength fastening solutions across West Bengal, Odisha, Assam, Chhattisgarh, Jharkhand, Bihar, Maharashtra, Telangana, Delhi, Meghalaya, Tamil Nadu, Uttar Pradesh & Karnataka.
Production Excellence at Fasteners
Fasteners India operates a modern manufacturing facility equipped with cold and hot forging machines, CNC machining centers, precision thread rolling units, controlled heat treatment systems, and advanced inspection tools. Every Flange Bolt is manufactured under strict quality control to ensure dimensional accuracy and consistent mechanical strength.
What Are Flange Bolts?
Flange bolts are fasteners with a wide flange under the head that acts as an integrated washer. This design helps distribute load evenly and reduces the need for separate washers, making installation faster and more reliable.
Key Performance Benefits:
- Built-in washer for even load distribution
- High resistance to loosening under vibration
- Strong clamping force
- Accurate threading for secure installation
- Long service life in demanding conditions
Types of Flange Bolt
- Serrated flange bolts
- Plain flange bolts
- High tensile flange bolts
- Stainless steel flange bolts
- Custom flange bolts as per drawings and specifications
Material & Grade Details of Our Flange Bolts
To ensure strength, durability, and long service life, our Flange Bolts are produced using premium-quality materials such as carbon steel, alloy steel, and stainless steel. We offer stainless steel variants including SS 202, SS 304, and SS 316, suitable for diverse industrial environments and corrosion-resistant applications.
Our manufacturing range includes multiple strength grades to match various engineering requirements. Available grade options include 4.6, 5.6, 8.8, 10.9, and 12.9, making these bolts ideal for light-duty as well as high-tensile fastening applications.
End-to-End Manufacturing Process
- Selection of certified raw materials
- Cold or hot forging of flange heads
- Precision machining and shank forming
- Thread rolling for superior strength
- Heat treatment for required grade
- Surface finishing and corrosion protection
- Dimensional inspection and mechanical testing
- Final packaging and dispatch
Technical Specification Chart
Bolt Size | Flange Type | Thread Type | Length Range | Grade | Finish |
M6 | Plain / Serrated | Metric | 15 – 80 mm | 4.6, 8.8 | Zinc plated, Black |
M8 | Plain / Serrated | Metric | 20 – 120 mm | 5.6, 8.8 | Zinc plated, Black |
M10 | Plain / Serrated | Metric | 25 – 150 mm | 8.8, 10.9 | Black, Phosphated |
M12 | Plain / Serrated | Metric | 30 – 200 mm | 8.8, 10.9 | Black, Phosphated |
M16 | Plain / Serrated | Metric | 40 – 250 mm | 10.9, 12.9 | Black, Zinc plated |
(Custom sizes, finishes, and coatings available on request.)
Common Application Areas
- Automotive and transport systems
- Machinery and equipment assembly
- Structural steel fabrication
- Electrical and mechanical installations
- Power plants and industrial projects
- Construction and infrastructure works
Why Choose Fasteners India for Flange Bolts?
- Fully in-house manufacturing
- Strict quality assurance processes
- Competitive factory-direct pricing
- Bulk supply capability
- Custom specifications and packaging
- Reliable delivery across Eastern and Central India
Regional Supply Coverage
Fasteners India supplies flange bolts across:
West Bengal, Odisha, Assam, Chhattisgarh, Jharkhand, Bihar, Maharashtra, Telangana, Delhi, Meghalaya, Tamil Nadu, Uttar Pradesh & Karnataka.
Contact Fasteners India Today
For dependable Flange Bolts manufacturing in Kolkata, contact Fasteners India today for quotations, samples, and technical support.