Stud Bolts Manufacturer, Supplier & Exporter in India
Adloy Fasteners is a manufacturer and global exporter of stud bolts from Mumbai, India. We produce full threaded, tap end, double end, reduced shank, flange bolting and weld studs in alloy steel (ASTM A193 B7, B7M, B16), stainless steel (B8, B8M), carbon steel, copper alloys, nickel alloys, super alloys and other non-ferrous metals. Our stud bolts are made to ASME B18.31.2, ASTM, DIN, ISO, BS and IS standards, or to your own drawing, with matching nuts and PTFE or other coatings on request. Reliable quality, competitive pricing and on-time export delivery make us a trusted partner for oil and gas, power and process industries worldwide.
Types of Stud Bolts We Manufacture
Full Threaded
Stud bolts threaded along the entire length, the most common type for flange and pressure-service joints.
Tap End
Studs with a long thread end for the nut and a shorter tap end that screws into a tapped hole.
Double End
Studs threaded at both ends with a plain centre, used with a nut on each end.
Reduced Sank
Stud bolts with a shank reduced to roughly the thread root diameter for better fatigue and shock resistance.
Flange Bolting
Stud bolts and nut sets made for ASME B16.5 and B16.47 flanges in piping, refinery and plant service.
Weld Studs
Studs welded to metal surfaces by arc or capacitor discharge welding, used as fixing points and shear connectors.
Stud Bolts by Material
Choose the right material for strength, corrosion resistance and temperature. Each material has its own page with grades and specifications.
Alloy Steel Stud Bolts
ASTM A193 B7, B7M, B16; A320 L7, L7M
Copper Alloy Stud Bolts
Brass, bronze, silicon bronze, phosphor bronze
Super Alloy Stud Bolts
Inconel 718, A286, Waspaloy, Nimonic
Non Ferrous Metal & Alloy Stud Bolts
Aluminium, titanium Grade 2 and Grade 5, brass
Nickel Alloy Stud Bolts
Monel 400, Inconel 625, Hastelloy C276, Incoloy 825
Carbon Steel Stud Bolts
ASTM A307 Gr B, Class 8.8, 10.9; A193 B7
Stainless Steel Stud Bolts
ASTM A193 B8, B8M, B8 Class 2; 304, 316, 321
| Material | Common Grades |
|---|---|
| Alloy Steel Stud Bolts | ASTM A193 B7, B7M, B16; A320 L7, L7M |
| Copper Alloy Stud Bolts | Brass, bronze, silicon bronze, phosphor bronze |
| Super Alloy Stud Bolts | Inconel 718, A286, Waspaloy, Nimonic |
| Non Ferrous Metal & Alloy Stud Bolts | Aluminium, titanium Grade 2 and Grade 5, brass |
| Nickel Alloy Stud Bolts | Monel 400, Inconel 625, Hastelloy C276, Incoloy 825 |
| Carbon Steel Stud Bolts | ASTM A307 Gr B, Class 8.8, 10.9; A193 B7 |
| Stainless Steel Stud Bolts | ASTM A193 B8, B8M, B8 Class 2; 304, 316, 321 |
Stud Bolts Specifications
| Product | Stud Bolts (6 types, custom designs) |
|---|---|
| Materials | Alloy Steel, Copper Alloys, Super Alloys, Non Ferrous Metal & Alloy, Nickel Alloy, Carbon Steel, Stainless Steel |
| Standards | ASME B18.31.2, ASTM A193, ASTM A320, ASTM A307, DIN 976, DIN 938, DIN 939, ISO, BS, IS |
| Matching Nuts | ASTM A194 Grade 2H, 4, 7, 8, 8M, heavy hex |
| Thread | UNC, 8UN (8-thread series), UNF, Metric coarse and fine |
| Diameter and Length | M6 to M100 and 1/4" to 4", any length on request |
| Finishes | Plain, Zinc Plated, Hot-Dip Galvanized, PTFE / Xylan, Black Oxide, Phosphate, Passivated |
| Certificates | EN 10204 3.1 on request |
Applications of Stud Bolts
- Flanged pipe joints in oil, gas and refineries
- Pressure vessels, boilers and heat exchangers
- Valves, pumps and compressors
- Power generation and petrochemical plants
- Offshore, subsea and marine equipment
- Steel structures and construction (weld studs)
- Heavy machinery, mining and cement plants
Why Choose Adloy Fasteners?
- Manufacturer with full custom stud bolt capability
- ASTM A193 and A320 grades with matching A194 nuts
- Test certificates and inspection reports on request
- Export-grade packing and timely worldwide shipping
- Competitive pricing for bulk and repeat orders