Stainless Steel Stud Bolt Suppliers in India
Unifit Fastener is a reputable and reliable manufacturer and supplier of high-quality stainless steel stud bolts in India, which provides precision-engineered fastening solutions to the challenging industrial requirements. The stud bolts are designed according to the ASTM A193 and other standard designs in the world, and they are associated with high tensile strength, good yield properties, and long-term durability. They come in 3 mm to 100 mm and up to 4 inches in diameter, which makes them not only suitable for standard needs but also for heavy duty.
Grades such as 304/304H/304L provide high levels of mechanical stability, and higher grades such as 316/316L and 317/317L have very high levels of corrosion resistance. Temperaments in high temperatures like 310/310S, 321, and 347/347H would be suitable in any industry that is subject to heat, oxidation, and thermal stress.
Our SS stud bolt are used in the pressure vessels, heat exchangers, boilers, petrochemical units, refineries, construction machinery, and marine projects, as well as in heavy engineering industries. Quality tests are done on all bolts to ensure that they are threaded correctly, of the right hardness, and that they can be extended.
We provide products that have high performance and relatively low prices, based on highly developed manufacturing technology, professional staff, and an effective logistics system. You can have fully threaded, double-ended, or customized stud bolts, but be sure of unmatched quality and long service life.
Choose Unifit Fastener for high-performance stainless steel stud bolts engineered to excel in the toughest industrial conditions.
Request QuoteTable of Contents
- What are Stainless Steel Stud Bolts?
- SS Stud Bolt Specification
- Send Your Enquiry
- Stainless Steel Stud Bolt Types
- Equivalents of Stainless Steel Stud Bolt
- Chemical Composition of SS Stud Bolt
- Mechanical Properties of Stainless Steel Stud Bolt
- Stainless Steel Stud Bolt Size Chart
- Torque Chart for Double End Stainless Steel Stud Bolts
- Physical Properties of Stainless Steel Stud Bolts
- Applications of SS Stud Bolt
- FAQs about SS Stud Bolt
What are Stainless Steel Stud Bolts?
A stainless steel stud bolts is a fully or partially threaded rod without a conventional bolt head, engineered to secure components by tightening nuts on both ends. Made from high-grade stainless steel, it offers excellent resistance to rust, moisture, and chemical exposure, ensuring long-lasting performance even in demanding or corrosive environments. Thanks to their strength and durability, SS stud bolt are widely used in structural assemblies, industrial equipment, pressure pipelines, and other heavy-duty applications that require reliable and secure fastening.
SS Stud Bolt Grades
SS Stud Bolt Specification
| Category | Details |
|---|---|
| Standard Sizes | Imperial: 1/2" to 4"Metric: M3–M60Length: 6mm–500mm |
| Stud Threads | UNC, BSW, Metric, UNF, BSF, etc. |
| Stud Ends | Sheared, Chamfer, Flat, Rounded, Saw Cut |
| Physical Properties | Density: 7.9 g/cm³Melting Point: 1400–1450°CTemperature Range: 500–860°C (932–1580°F) |
| Standards | ASTM A193ASME SA193ISO 4017GB5783, DIN 931 |
| Neck Types | Hex, Square, Triangular, Oval, Knurled, etc. |
| Stud Types | Double-EndFully/Fine ThreadedTap-End |
| Manufacturing Process | Hot ForgingCold ForgingCNC Machining |
| Surface Finish | PassivationAnodizingSand BlastingPolishElectroplatingRust Preventive Oil |
| Coatings | Black OxideCadmiumGalvanizedTeflonXylanZinc |
| Bolt Types | Round, Pan, Hex Head, Oval, Truss Head |
| Head Drive Options | SlottedSix-LobePhillips/SlotPhillips |
| Applications | Wind TowersElectronics IndustryConstructionRailway |
| Origin | JapaneseIndianKoreanEuropeanAmerican |
Send Your Enquiry
Stainless Steel Stud Bolt Types
SS Stud Bolt
Stainless Steel Wheel Stud Bolts
Double End Stainless Steel Stud Bolts
Fully Threaded Stud Bolts
SS Flange Stud Bolts
SS Tap End Stud Bolts
Stainless Stud Anchor Bolts
SS Stud Bolts And Nuts
SS Welding Studs
Equivalents of Stainless Steel Stud Bolt
| STANDARD | WERKSTOFF NR. | UNS | BS | EN | AFNOR | JIS | GOST |
|---|---|---|---|---|---|---|---|
| SS 304 | 1.4301 | S30400 | 304S31 | X5CrNi18-10 | Z7CN18‐09 | SUS 304 | 08Х18Н10 |
| SS 304L | 1.4306 / 1.4307 | S30403 | 3304S11 | X2CrNi18-9 / X2CrNi19-11 | Z3CN18‐10 | SUS 304L | 03Х18Н11 |
| SS 304H | 1.4301 | S30409 | – | – | – | – | – |
| SS 310 | 1.4841 | S31000 | 310S24 | X15CrNi25-20 | – | SUS 310 | 20Ch25N20S2 |
| SS 310S | 1.4845 | S31008 | 310S16 | X8CrNi25-21 | – | SUS 310S | 20Ch23N18 |
| SS 310H | – | S31009 | – | – | – | – | – |
| SS 316 | 1.4401 / 1.4436 | S31600 | 316S31 / 316S33 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 | Z7CND17‐11‐02 | SUS 316 | – |
| SS 316L | 1.4404 / 1.4435 | S31603 | 316S11 / 316S13 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | SUS 316L | 03Ch17N14M3 / 03Ch17N14M2 |
| SS 316H | 1.4401 | S31609 | – | – | – | – | – |
| SS 316Ti | 1.4571 | S31635 | 320S31 | X6CrNiMoTi17-12-2 | Z6CNDT17‐123 | SUS 316Ti | 08Ch17N13M2T |
| SS 317 | 1.4449 | S31700 | – | – | – | SUS 317 | – |
| SS 317L | 1.4438 | S31703 | – | X2CrNiMo18-15-4 | – | SUS 317L | – |
| SS 321 | 1.4541 | S32100 | – | X6CrNiTi18-10 | – | SUS 321 | – |
| SS 321H | 1.4878 | S32109 | – | X12CrNiTi18-9 | – | SUS 321H | – |
| SS 347 | 1.4550 | S34700 | – | X6CrNiNb18-10 | – | SUS 347 | 08Ch18N12B |
| SS 347H | 1.4961 | S34709 | – | X6CrNiNb18-12 | – | SUS 347H | – |
| SS 904L | 1.4539 | N08904 | 904S13 | X1NiCrMoCu25-20-5 | Z2 NCDU 25-20 | SUS 904L | STS 317J5L |
Chemical Composition of SS Stud Bolt
| Type | Chromium (%) | Nickel (%) | Phosphorus (%) | Silicon (%) | Molybdenum (%) | Manganese (%) | Sulphur (%) | Carbon (%) |
|---|---|---|---|---|---|---|---|---|
| 302 | 17.00–19.00 | 8.00–10.00 | 0.045 | 1.00 | – | 2.00 | 0.030 | 0.15 |
| 309 | 22.00–24.00 | 12.00–15.00 | 0.045 | 1.00 | – | 2.00 | 0.030 | 0.20 |
| 304L* | 18.00–20.00 | 8.00–12.00 | 0.045 | 1.00 | – | 2.00 | 0.030 | 0.03 |
| 304* | 18.00–20.00 | 8.00–10.50 | 0.045 | 1.00 | – | 2.00 | 0.030 | 0.08 |
| 309S | 22.00–24.00 | – | 0.045 | 1.00 | – | 2.00 | – | 0.08 |
| 317 | 18.00–20.00 | 11.00–15.00 | 0.045 | 1.00 | 3.00–4.00 | 2.00 | 0.030 | 0.08 |
| 310S | 24.00–26.00 | 19.00–22.00 | 0.045 | 1.50 | – | 2.00 | 0.030 | 0.08 |
| 316* | 16.00–18.00 | 10.00–14.00 | 0.045 | 1.00 | 2.00–3.00 | 2.00 | 0.030 | 0.08 |
| 310 | 24.00–26.00 | 19.00–22.00 | 0.045 | 1.50 | – | 2.00 | 0.030 | 0.25 |
| 316L* | 16.00–18.00 | 10.00–14.00 | 0.045 | 1.00 | 2.00–3.00 | 2.00 | 0.030 | 0.03 |
| 347 | 17.00–19.00 | 9.00–12.00 | 0.040 | 0.50–1.00 | 0.50–0.75 | 2.00 | 0.030 | 0.08 |
| 317L | 18.00–20.00 | 11.00–15.00 | 0.045 | 0.75 | 3.00–4.00 | 2.00 | 0.030 | 0.03 |
| 321 | 17.00–19.00 | 9.00–12.00 | 0.040 | 1.00 | 0.75–0.75 | 2.00 | 0.030 | 0.08 |
Mechanical Properties of Stainless Steel Stud Bolt
| Type | Tensile (ksi) min | Yield (ksi) min | Hardness (Brinell) max | Hardness (Rockwell B) max | Elongation min |
|---|---|---|---|---|---|
| 302 | 75 | 30 | 183 | 88 | 40% in 2″ |
| 304* | 75 | 30 | 183 | 88 | 40% in 2″ |
| 304L* | 70 | 30 | 183 | 88 | 40% in 2″ |
| 309 | 75 | 30 | 217 | 95 | 40% in 2″ |
| 309S | 75 | 30 | 217 | 95 | 40% in 2″ |
| 310 | 75 | 30 | 217 | 95 | 40% in 2″ |
| 310S | 75 | 30 | 217 | 95 | 40% in 2″ |
| 316* | 75 | 30 | 217 | 95 | 40% in 2″ |
| 316L* | 70 | 25 | 217 | 95 | 35% in 2″ |
| 317 | 75 | 30 | 217 | 95 | 35% in 2″ |
| 317L | 75 | 30 | 217 | 95 | 35% in 2″ |
| 321 | 75 | 30 | 183 | 88 | 40% in 2″ |
| 347 | 75 | 30 | 183 | 88 | 40% in 2″ |
Stainless Steel Stud Bolt Size Chart
| Dia | M3 | M4 | M5 | M6 | M8 |
|---|---|---|---|---|---|
| Head OD (+/- 0.2 mm) | |||||
| Nominal | 4.50 | 5.50 | 6.50 | 7.50 | 9.00 |
| Max | 4.30 | 5.30 | 6.30 | 7.30 | 8.80 |
| Min | 4.70 | 5.70 | 6.70 | 7.70 | 9.20 |
| Dia (+/- 0.08 mm) | |||||
| Nominal | 0.60 | 0.65 | 0.75 | 0.75 | 0.75 |
| Max | 0.52 | 0.57 | 0.67 | 0.67 | 0.67 |
| Min | 0.68 | 0.73 | 0.83 | 0.83 | 0.83 |
| Length (+/- 0.05 mm) | |||||
| Nominal | 0.55 | 0.55 | 0.80 | 0.80 | 0.85 |
| Max | 0.50 | 0.50 | 0.75 | 0.75 | 0.80 |
| Min | 0.60 | 0.60 | 0.85 | 0.85 | 0.90 |
| Head Thickness (mm) | |||||
| Max | 1.40 | 1.40 | 1.40 | 1.40 | 1.40 |
| Min | 0.70 | 0.70 | 0.70 | 0.70 | 0.80 |
Torque Chart for Double End Stainless Steel Stud Bolts
| Size | Stud Bolts Sequence | Bolt Size | 1st Torque (ft-lbs) | 2nd Torque (ft-lbs) | Final Torque (ft-lbs) |
|---|---|---|---|---|---|
| 1/2″ | 4-bolt | 1/2″ | 10 | 20 | 30 |
| 2-1/2″ | 4-bolt | 5/8″ | 40 | 80 | 120 |
| 3-1/2″ | 8-bolt | 5/8″ | 40 | 80 | 120 |
| 5″ | 8-bolt | 3/4″ | 60 | 120 | 200 |
| 2″ | 4-bolt | 5/8″ | 40 | 80 | 120 |
| 3″ | 4-bolt | 5/8″ | 40 | 80 | 120 |
| 18″ | 16-bolt | 1-1/8″ | 213 | 426 | 710 |
| 1″ | 4-bolt | 1/2″ | 15 | 30 | 50 |
| 1-1/2″ | 4-bolt | 1/2″ | 20 | 40 | 60 |
| 3/4″ | 4-bolt | 1/2″ | 13 | 27 | 40 |
| 20″ | 20-bolt | 1-1/8″ | 213 | 426 | 710 |
| 24″ | 20-bolt | 1-1/4″ | 300 | 600 | 1,000 |
| 1-1/4″ | 4-bolt | 1/2″ | 20 | 40 | 60 |
| 6″ | 8-bolt | 3/4″ | 60 | 120 | 200 |
| 12″ | 12-bolt | 7/8″ | 95 | 190 | 320 |
| 14″ | 12-bolt | 1″ | 147 | 294 | 490 |
| 8″ | 8-bolt | 3/4″ | 60 | 120 | 200 |
| 4″ | 8-bolt | 5/8″ | 40 | 80 | 120 |
| 10″ | 12-bolt | 7/8″ | 95 | 190 | 320 |
| 16″ | 16-bolt | 1″ | 147 | 294 | 490 |
Physical Properties of Stainless Steel Stud Bolts
| Grades | Density (g/cm³) | Melting Point (°C) | Electrical Resistivity (µΩ·cm) | Thermal Conductivity (W/m·K) | Coefficient of Thermal Expansion (μm/m·°C) |
|---|---|---|---|---|---|
| SS 304 | 7.93 | 1400 – 1450 | 72.3 | 16.2 | 16.0 |
| SS 304L | 7.93 | 1400 – 1450 | 72.3 | 16.2 | 16.0 |
| SS 304H | 7.93 | 1400 – 1450 | 72.3 | 16.2 | 16.0 |
| SS 310 | 7.90 | 1400 – 1450 | 72.0 | 14.0 | 17.0 |
| SS 310S | 7.90 | 1400 – 1450 | 72.0 | 14.0 | 17.0 |
| SS 316 | 7.98 | 1375 – 1400 | 74.0 | 16.3 | 16.5 |
| SS 316L | 7.98 | 1375 – 1400 | 74.0 | 16.3 | 16.5 |
| SS 316Ti | 7.98 | 1375 – 1400 | 74.0 | 16.3 | 16.5 |
| SS 317 | 7.95 | 1375 – 1400 | 74.5 | 16.3 | 16.5 |
| SS 317L | 7.95 | 1375 – 1400 | 74.5 | 16.3 | 16.5 |
| SS 321 | 7.93 | 1400 – 1450 | 74.0 | 16.2 | 16.0 |
| SS 321H | 7.93 | 1400 – 1450 | 74.0 | 16.2 | 16.0 |
| SS 347 | 7.93 | 1400 – 1450 | 74.0 | 16.2 | 16.0 |
| SS 410 | 7.75 | 1480 – 1530 | 78.0 | 30.0 | 11.5 |
| SS 446 | 7.80 | 1400 – 1450 | 76.0 | 30.0 | 11.5 |
| SS 904L | 8.00 | 1350 – 1400 | 70.0 | 15.0 | 16.0 |
Applications of SS Stud Bolt
Our Stainless Steel Stud Bolts are designed for high-performance fastening in demanding industrial and structural applications. Their excellent strength, corrosion resistance, and durability make them ideal for:
- Petrochemical & Chemical Plants: Used in pipelines, pressure vessels, heat exchangers, and reactors to withstand corrosive and high-temperature environments.
- Power & Energy Industry: Suitable for boilers, turbines, wind towers, and solar energy structures.
- Construction & Heavy Engineering: Provides secure fastening for bridges, machinery, structural steel, and heavy equipment.
- Marine & Offshore Applications: Corrosion-resistant bolts for ships, docks, and offshore platforms exposed to seawater.
- Automotive & Machinery: Used in engines, gearboxes, and mechanical assemblies requiring high tensile strength.
- Electronics & Electrical Equipment: Reliable for mounting components in high-temperature and precision environments.
SS stud bolt are available in a variety of grades, threads, and sizes to meet specific industrial needs, ensuring safety, durability, and long-term performance across multiple sectors.
FAQs about SS Stud Bolt
What are stainless steel stud bolts used for?
Stainless steel stud bolts are used to fasten two components securely in high-temperature, high-pressure, and corrosive environments. They are commonly applied in construction, petrochemical plants, power plants, marine, and automotive industries.
Are stainless steel stud bolts corrosion-resistant?
Yes. Made from high-grade stainless steel such as 304, 316, 317, and 321, these bolts provide excellent corrosion and rust resistance, making them suitable for marine, chemical, and outdoor applications.
What grades of stainless steel stud bolts are available?
Unifit Fastener offers a wide range of grades including 304/304L/304H, 310/310S, 316/316L/316Ti, 317/317L, 321/321H, 347/347H, and 904L to meet different mechanical and environmental requirements.
Are custom SS stud bolts available?
Yes. Unifit Fastener provides custom lengths, threads, and grades to match specific industrial needs, ensuring precise fit and performance.