SS 321 Threaded RodUNS S32100 · DIN 976-1:2016-09, Form A, where applicable · Manufacturer, trader & exporter, India
AISI 321 · UNS S32100
An SS 321 threaded rod is a continuously threaded bar cut to length. Finished fastener specification not asserted; ASTM A193 B8T may be specified for applicable bolting products — confirm the required product form and grade in the purchase specification. Threaded rod is cut to make studs and hangers. Available in full lengths or cut pieces.
- UNS S32100
- DIN 976-1:2016-09, Form A, where applicable
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 321 Threaded Rod?
- What it is
- A continuously threaded bar cut to length
- Finished spec
- Not asserted
- Material / feedstock
- ASTM A193 B8T may be specified for applicable bolting products; confirm the required product form and grade in the purchase specification
- Dimensions
- DIN 976-1:2016-09, Form A, where applicable
- Grade
- SS 321 · UNS S32100
- Best at
- High-temperature service between 425 and 815 °C
SS 321 Threaded Rod Specification
| Product | SS 321 Threaded Rod |
|---|---|
| Finished fastener specification | Not asserted |
| Material / feedstock specification | ASTM A193 B8T may be specified for applicable bolting products; confirm the required product form and grade in the purchase specification |
| Dimensional standard | DIN 976-1:2016-09, Form A, where applicable |
| Manufacturing route | Route dependent on product design and purchase specification |
| Project / purchase specification | Yes — finished fastener requirements are to the purchase specification or project drawing |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI (as specified in the PO) · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose a Threaded Rod
Threaded rod is cut to make studs and hangers. Available in full lengths or cut pieces.
- 1 m and 3 m lengths
- Cut to size
- UNC, UN-8 and metric
More on choosing: Threaded rod guide.
SS 321 Threaded Rod: Why 321 for threaded rods
Threaded rod is cut to make studs and hangers. Available in full lengths or cut pieces. In SS 321, 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 321 is picked for high-temperature service between 425 and 815 °C. |
|---|---|
| Typical service | Aircraft exhaust — Manifolds, bellows and exhaust systems. |
| Bolting | ASTM A193 B8T studs with A194 8T nuts |
SS 321 Threaded Rod Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Titanium | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Nitrogen | As specified |
| Phosphorus | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A240 for UNS S32100.
SS 321 Threaded Rod Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
| Hardness | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A240 for UNS S32100 — Annealed plate & sheet.
Full chemistry, properties and equivalents are on the SS 321 grade page.
Other SS 321 fasteners
SS 321 Threaded Rod — questions buyers ask
Is threaded rod the same as a stud bolt?
Stud bolts are cut from threaded rod or threaded to length and supplied with nuts, to flange-bolting dimensions.
What nut is used with SS 321 threaded rods?
ASTM A194 8T heavy hex nuts.
Which standard covers SS 321 threaded rods?
Finished fastener specification: Not asserted. Material / feedstock: ASTM A193 B8T may be specified for applicable bolting products; confirm the required product form and grade in the purchase specification. Dimensions: DIN 976-1:2016-09, Form A, where applicable. State the finished specification, material and dimensions on your purchase order or project drawing.
What decides the price of a SS 321 threaded rod?
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 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026