SS 310 / 310S Hex BoltASTM A276 · ASME B18.2.1 · Manufacturer, stockist & exporter, India
AISI 310S · UNS S31008
An SS 310 / 310S hex bolt is a bolt with a hexagonal head, made from SS 310 / 310S to ASTM A276 / A479. Hex bolts join flanges, structures and equipment where one side is accessible for the head. Dimensions to ASME B18.2.1 or DIN 931 / 933.
- ASTM A276
- ASME B18.2.1
- 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 Hex Bolt?
- What it is
- A bolt with a hexagonal head
- Material
- ASTM A276 / A479
- Dimensions
- ASME B18.2.1 · DIN 931 / 933
- Grade
- SS 310 / 310S · UNS S31008
- Best at
- Furnaces, burners and heat treatment at high temperature
SS 310 / 310S Hex Bolt Specification
| Product | SS 310 / 310S Hex Bolt |
|---|---|
| Material standard | ASTM A276 / A479 |
| Dimensional standard | ASME B18.2.1 · DIN 931 / 933 |
| 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 Hex Bolt
Hex bolts join flanges, structures and equipment where one side is accessible for the head. Dimensions to ASME B18.2.1 or DIN 931 / 933.
- Partially or fully threaded
- ASME B18.2.1 / DIN 931 / DIN 933
- Supplied with nuts and washers
More on choosing: Hex bolt guide.
SS 310 / 310S Hex Bolt: Why 310S for hex bolts
Hex bolts join flanges, structures and equipment where one side is accessible for the head. Dimensions to ASME B18.2.1 or DIN 931 / 933. 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 Hex 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 Hex 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 Hex Bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 310 / 310S Hex Bolt — questions buyers ask
DIN 931 or DIN 933?
DIN 931 bolts are partly threaded; DIN 933 are fully threaded.
What nut is used with SS 310 / 310S hex bolts?
A nut in the same alloy, machined from ASTM A276 / A479 bar, unless the project specifies otherwise.
Which standard covers SS 310 / 310S hex bolts?
The material is ASTM A276 / A479; dimensions follow ASME B18.2.1 · DIN 931 / 933. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 310 / 310S hex 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