SS 304 Hex BoltASTM A193 · ASME B18.2.1 · Manufacturer, stockist & exporter, India
AISI 304 · UNS S30400
An SS 304 hex bolt is a bolt with a hexagonal head, made from SS 304 to ASTM A193 B8 · A194 8. 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 A193
- 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 304 Hex Bolt?
- What it is
- A bolt with a hexagonal head
- Material
- ASTM A193 B8 · A194 8
- Dimensions
- ASME B18.2.1 · DIN 931 / 933
- Grade
- SS 304 · UNS S30400
- Best at
- General corrosion resistance, food, water and architectural work
SS 304 Hex Bolt Specification
| Product | SS 304 Hex Bolt |
|---|---|
| Material standard | ASTM A193 B8 · A194 8 |
| 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 304 Hex Bolt: Why 304 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 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 Hex Bolt Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 17.5 – 19.5 |
| Nickel | 8.0 – 10.5 |
| Carbon | 0.07 max |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Nitrogen | 0.10 max |
| Phosphorus | 0.045 max |
| Sulphur | 0.030 max |
SS 304 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 | 201 HB max |
Full chemistry, properties and equivalents are on the SS 304 grade page.
Other SS 304 fasteners
SS 304 Hex Bolts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 304 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 304 hex bolts?
ASTM A194 8 heavy hex nuts.
Which standard covers SS 304 hex bolts?
The material is ASTM A193 B8 · A194 8; 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 304 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