SS 304 Stud BoltASTM A193 · ASME B18.31.2 · Manufacturer, stockist & exporter, India
AISI 304 · UNS S30400
An SS 304 stud bolt is a fully threaded rod supplied with two heavy hex nuts. ASTM A193 B8 where specified; confirm grade and class in the purchase specification. Stud bolts are the standard bolting for pipe flanges. Length is measured end-to-end excluding points, per ASME B16.5 bolting tables.
- ASTM A193
- 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 304 Stud Bolt?
- What it is
- A fully threaded rod supplied with two heavy hex nuts
- Finished spec
- ASTM A193 B8 where specified
- Material / feedstock
- Within the finished specification (A193 B8)
- Dimensions
- ASME B18.31.2 · B16.5 bolting tables
- Grade
- SS 304 · UNS S30400
- Best at
- General corrosion resistance, food, water and architectural work
SS 304 Stud Bolt Specification
| Product | SS 304 Stud Bolt |
|---|---|
| Finished fastener specification | ASTM A193 B8 where specified |
| Material / feedstock specification | Within the finished specification (A193 B8) |
| Dimensional standard | ASME B18.31.2 · B16.5 bolting tables |
| Manufacturing route | To the finished specification 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 · 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 304 Stud Bolt: Why 304 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 304, 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 304 is picked for general corrosion resistance, food, water and architectural work. |
|---|---|
| Typical service | Food & dairy — Tanks, piping and equipment that must be cleaned daily. |
| Bolting | ASTM A193 B8 studs with A194 8 nuts |
SS 304 Stud Bolt Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Nitrogen | As specified |
| Phosphorus | As specified |
| Sulphur | 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 S30400.
SS 304 Stud Bolt 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 S30400 — Annealed plate & sheet.
Full chemistry, properties and equivalents are on the SS 304 grade page.
Other SS 304 fasteners
SS 304 Stud Bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 304 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 304 stud bolts?
ASTM A194 8 heavy hex nuts.
Which standard covers SS 304 stud bolts?
Finished fastener specification: ASTM A193 B8 where specified. Material / feedstock: Within the finished specification (A193 B8). Dimensions: ASME B18.31.2 · B16.5 bolting tables. State the finished specification, material and dimensions on your purchase order or project drawing.
What decides the price of a SS 304 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