SS 310 / 310S Machine ScrewASTM A276 · ASME B18.6.3 · Manufacturer, stockist & exporter, India
AISI 310S · UNS S31008
An SS 310 / 310S machine screw is a small-diameter screw for equipment assembly, made from SS 310 / 310S to ASTM A276 / A479. Machine screws assemble instruments, panels and equipment. Pan, countersunk and cheese heads.
- ASTM A276
- ASME B18.6.3
- 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 Machine Screw?
- What it is
- A small-diameter screw for equipment assembly
- Material
- ASTM A276 / A479
- Dimensions
- ASME B18.6.3 · DIN 84 / 963
- Grade
- SS 310 / 310S · UNS S31008
- Best at
- Furnaces, burners and heat treatment at high temperature
SS 310 / 310S Machine Screw Specification
| Product | SS 310 / 310S Machine Screw |
|---|---|
| Material standard | ASTM A276 / A479 |
| Dimensional standard | ASME B18.6.3 · DIN 84 / 963 |
| 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 Machine Screw
Machine screws assemble instruments, panels and equipment. Pan, countersunk and cheese heads.
- Pan, flat and cheese heads
- Slotted or Phillips
- M2 – M10 typical
More on choosing: Machine screw guide.
SS 310 / 310S Machine Screw: Why 310S for machine screws
Machine screws assemble instruments, panels and equipment. Pan, countersunk and cheese heads. 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 Machine Screw 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 Machine Screw 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 Machine Screws for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 310 / 310S Machine Screw — questions buyers ask
What sizes are machine screws?
Usually small diameters, M2 to M10 or #2 to 3/8".
What nut is used with SS 310 / 310S machine screws?
A nut in the same alloy, machined from ASTM A276 / A479 bar, unless the project specifies otherwise.
Which standard covers SS 310 / 310S machine screws?
The material is ASTM A276 / A479; dimensions follow ASME B18.6.3 · DIN 84 / 963. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 310 / 310S machine screw?
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