ASTM A193 B8 / B8M · 304 · 316
Stainless Steel Stud Bolt
Austenitic stud bolts in Class 1 or strain-hardened Class 2 for corrosive process piping, water treatment and cryogenic flanges.
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ISO-Certified · Mumbai, India
Precision Stud Bolt Manufacturer in India
ASTM, ASME & DIN fasteners for oil & gas, petrochemical and power projects worldwide.
Exporting to 24+ Countries
Reliable Bolts & Nuts for Critical Service
Exotic alloys, full heat traceability and export-ready documentation.
Product Portfolio
Stud Bolts by Material Grade
Every stud is thread-rolled, heat-treated where specified and marked with grade and heat number, so your inspectors can trace it back to the original mill certificate.
ASTM A193 B7 · B16 · A320 L7
High Tensile Stud Bolt
Quenched and tempered Cr-Mo studs (B7: min. 125 ksi tensile up to 2.5") for high-pressure, high-temperature flange bolting.
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UNS S31803 / S32205
Duplex Steel Stud Bolt
Roughly twice the yield strength of 316 stainless, with strong resistance to chloride stress corrosion cracking in chemical and marine plants.
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UNS S32750 / S32760 · PREN > 40
Super Duplex Stud Bolt
The preferred choice for offshore platforms, subsea equipment and desalination systems exposed to warm seawater.
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Inconel 600 · 625 · 718 · X-750
Inconel Stud Bolt
Nickel-chromium studs that retain strength and oxidation resistance at elevated temperatures in turbines, furnaces and heat exchangers.
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Monel 400 · K-500
Monel Stud Bolt
Nickel-copper studs resisting seawater, hydrofluoric acid and alkalis, widely used in marine hardware and chemical plants.
Made to Order
Hastelloy C276 · C22 · B2
Hastelloy Stud Bolt
Withstands reducing and oxidizing acids, chlorides and wet chlorine in the most aggressive chemical processing environments.
Made to Order
Titanium Gr 2 · Gr 5 (Ti-6Al-4V)
Titanium Stud Bolt
An outstanding strength-to-weight ratio and near-immunity to seawater corrosion for aerospace, marine and chemical duty.
Made to Order C65100 · C65500
Silicon Bronze Stud Bolt
Non-magnetic copper-silicon studs with excellent corrosion resistance for marine, electrical and utility hardware.
Made to Order Complete Bolting Solutions
Our Fasteners Range
Source studs, nuts, washers and rods from a single manufacturer to keep grades, coatings and certification consistent across your entire bolting package.
Bolts
Hex, heavy hex, carriage and flange bolts to ASME B18.2.1, DIN 931/933 and ISO 4014/4017.
Nuts
Heavy hex, hex and lock nuts to ASTM A194 2H, 2HM, 4, 7, 8, 8M and ASME B18.2.2.
Screws
Socket cap, set, machine and self-tapping screws to DIN 912, ISO 4762 and custom drawings.
Washers
Flat, spring, lock and hardened F436 washers for even load distribution and joint protection.
Threaded Rods
Fully threaded rods and bars to DIN 975/976 and ASTM A193, cut to any required length.
Stud Bolts
Full-thread and double-end studs sized for ASME B16.5 flanges, manufactured to ASME B18.31.2.
ISO CertifiedQuality Management
About Stud Bolt India
Where Quality Meets Reliability
Based in Mumbai, Stud Bolt India manufactures and supplies bolts, nuts, screws, threaded rods, washers and stud bolts for refineries, EPC contractors, OEMs and maintenance teams. Our engineers work from your datasheet or drawing, select the correct grade and coating for the service conditions, and verify every lot before it leaves our facility.
Wide Product Range
Carbon, alloy, stainless and nickel alloys under one roof.
ISO-Certified Quality
Documented inspection at every production stage.
Full Traceability
Heat-number marking with EN 10204 3.1 certificates.
Custom Manufacturing
Special lengths, threads and coatings to drawing.
Why Choose Us
Why Global Buyers Choose Stud Bolt India
Procurement teams need more than a price list. They need correct grades, consistent dimensions, complete paperwork and shipments that arrive on schedule. That is how we have built long-term supply relationships with clients across the Middle East, Europe, the Americas and Asia.
- Timely Delivery
- Wide Range of Fasteners
- Responsive Technical Support
- Customization to Drawing
- Superior Product Quality
- Export-Ready Packing
Raw Material Check
Mill certificates verified and PMI on incoming bar stock.
Forging & Machining
Hot forging and CNC machining to exact dimensions.
Heat Treatment
Quenching and tempering to meet specified hardness.
Testing
Tensile, hardness, thread gauge and dimensional checks.
Marking & Packing
Grade and heat marking, then seaworthy export packing.
Proven Track Record
Stud Bolt India in Numbers
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Countries Served Buyer's Reference
Technical Specifications at a Glance
A quick reference for engineers and buyers comparing standards, grades and size ranges before sending an RFQ.
| Product | Dimensional Standards | Common Grades | Typical Size Range |
|---|---|---|---|
| Stud Bolts | ASME B16.5, ASME B18.31.2 | A193 B7, B7M, B8, B8M, B16; A320 L7; A453 660 | M6 – M100 / 1/4" – 4" |
| Nuts | ASME B18.2.2, DIN 934, ISO 4032 | A194 2H, 2HM, 4, 7, 8, 8M; Class 8, 10 | M6 – M100 / 1/4" – 4" |
| Bolts | ASME B18.2.1, DIN 931/933, ISO 4014/4017 | Property Class 8.8, 10.9, 12.9; SS 304/316 | M5 – M72 |
| Threaded Rods | DIN 975, DIN 976 | A193 B7, B8, B8M; Class 4.8, 8.8 | M6 – M64, up to 3 m length |
| Washers | ASME B18.21.1, DIN 125, DIN 127 | ASTM F436, SS 304/316, alloy steel | M3 – M100 |
| Coated Fasteners | ASTM A153 (HDG), ASTM F1941 (zinc) | PTFE / Xylan, HDG, zinc, zinc-nickel | All sizes above |
Non-standard sizes, special thread pitches and customer-specific drawings are manufactured on request.
Client Testimonials
What Our Clients Say
Feedback from operations, project and procurement professionals who rely on our fasteners.
Stud Bolt India has been a trusted partner for our business for years. Their fasteners are consistently high in quality, deliveries arrive on time, and the team offers precise solutions tailored to our requirements.
Balaji SOperations Manager
We source industrial fasteners from Stud Bolt India for our construction projects and they never disappoint. Their quality, consistency and attention to detail set them apart from other suppliers.
Sushant DSenior Project Manager
As a manufacturer, we need high-grade fasteners for our machinery. Stud Bolt India delivers dependable quality that keeps our equipment performing at its best, and their customer service is exceptional.
Vikram MProduction Head
From bolts to washers, Stud Bolt India is our go-to source for industrial fasteners. Their products are durable and cost-effective, and delivery schedules are always met. Highly recommended.
Govind CPurchasing Manager
Trusted by Leading Industrial Brands
Industry Applications
Our Industry Expertise
We recommend grades based on real service conditions: pressure, temperature, media and environment.
Petrochemical Industry
B7 studs with 2H nuts and PTFE coating for flanged joints in reactors and process piping.
Oil & Gas Industry
B7M / 2HM for sour service and A320 L7 for low-temperature pipelines.
Aerospace Industry
Titanium Grade 5 and Inconel 718 where weight and heat resistance matter.
Marine Industry
Super duplex, Monel K-500 and silicon bronze for seawater exposure.
Paper Mill
316L and duplex fasteners to resist bleaching chemicals and moisture.
Food Industry
Hygienic 304 and 316 stainless fasteners for washdown equipment.
Pump Industry
Duplex 2205 and alloy steel studs for casings, seals and couplings.
Automobile Industry
Class 8.8 and 10.9 bolts and screws with zinc or zinc-nickel finish.
FAQ
Frequently Asked Questions
Which materials do you manufacture stud bolts in?
We manufacture stud bolts in carbon steel, alloy steel (ASTM A193 B7, B7M, B16 and A320 L7), stainless steel (B8, B8M), duplex 2205, super duplex S32750/S32760, Inconel, Monel, Hastelloy, titanium and silicon bronze.
Which standards do your fasteners conform to?
Our fasteners are produced to ASTM A193, A194, A320 and A453, ASME B16.5, B18.2.1, B18.2.2 and B18.31.2, plus DIN and ISO standards. Non-standard parts are manufactured to customer drawings.
What documentation is supplied with export orders?
Each shipment can be supplied with EN 10204 3.1 material test certificates, heat-number traceability, dimensional and hardness reports, and third-party inspection reports on request.
Do you offer coated stud bolts?
Yes. We supply PTFE/Xylan, hot-dip galvanized, zinc, zinc-nickel and other protective coatings that extend service life in marine, offshore and chemical environments.
Do you export fasteners outside India?
Yes. We export to more than 24 countries, including the UAE, Saudi Arabia, Kuwait, Qatar, the USA, the UK, Germany and Australia, using seaworthy export packing.
Have a Bolting Specification or Drawing?
Share your grade, size, quantity and coating requirements. Our technical team will confirm material suitability and lead time.