SS 310 / 310S Stud BoltASTM A276 · ASME B18.31.2 · Manufacturer, stockist & exporter, India
AISI 310S · UNS S31008
An SS 310 / 310S stud bolt is a fully threaded rod supplied with two heavy hex nuts, made from SS 310 / 310S to ASTM A276 / A479. Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables.
- ASTM A276
- ASME B18.31.2
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 310 / 310S Stud Bolt?
- What it is
- A fully threaded rod supplied with two heavy hex nuts
- Material
- ASTM A276 / A479
- Dimensions
- ASME B18.31.2 · B16.5 bolting tables
- Grade
- SS 310 / 310S · UNS S31008
- Best at
- Furnaces, burners and heat treatment at high temperature
SS 310 / 310S Stud Bolt Specification
| Product | SS 310 / 310S Stud Bolt |
|---|---|
| Material standard | ASTM A276 / A479 |
| Dimensional standard | ASME B18.31.2 · B16.5 bolting tables |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Stud Bolt
Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables.
- Fully threaded, with two heavy hex nuts
- Length per ASME B16.5 flange class
- UNC up to 1", UN-8 above
More on choosing: Stud bolt guide.
SS 310 / 310S Stud Bolt: Why 310S for stud bolts
Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables. In SS 310 / 310S, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Stainless fasteners resist atmospheric and process corrosion. SS 310 / 310S is picked for furnaces, burners and heat treatment at high temperature. |
|---|---|
| Typical service | Furnace parts — Muffles, retorts, radiant tubes and conveyor belts. |
| Bolting | A193 B8 or project-specified bolting |
SS 310 / 310S Stud Bolt Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 24.0 – 26.0 |
| Nickel | 19.0 – 22.0 |
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Silicon | 1.50 max |
| Phosphorus | 0.045 max |
| Sulphur | 0.030 max |
| Iron | Balance |
SS 310 / 310S Stud Bolt Mechanical Properties
| Annealed plate & sheet | Value |
|---|---|
| Tensile strength | 515 MPa · 75 ksi |
| Yield strength 0.2% | 205 MPa · 30 ksi |
| Elongation | 40% |
| Hardness | 217 HB max |
Full chemistry, properties and equivalents are on the SS 310 / 310S grade page.
Standards on this page
Other SS 310 / 310S fasteners
SS 310 / 310S Stud Bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 310 / 310S Stud Bolt — questions buyers ask
How is stud bolt length measured?
From first thread to first thread, excluding chamfered points, as tabulated in ASME B16.5.
What nut is used with SS 310 / 310S stud bolts?
A nut in the same alloy, machined from ASTM A276 / A479 bar, unless the project specifies otherwise.
Which standard covers SS 310 / 310S stud bolts?
The material is ASTM A276 / A479; dimensions follow ASME B18.31.2 · B16.5 bolting tables. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 310 / 310S stud bolt?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026