SS 316 / 316L Hex BoltASTM A193 · ASME B18.2.1 · Manufacturer, trader & exporter, India
AISI 316L · UNS S31603
An SS 316 / 316L hex bolt is a bolt with a hexagonal head. ASTM A193 B8M where specified; confirm grade and class in the purchase specification. 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 (legacy DIN) where an older specification calls for them.
- 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 316 / 316L Hex Bolt?
- What it is
- A bolt with a hexagonal head
- Finished spec
- ASTM A193 B8M where specified
- Material / feedstock
- Within the finished specification (A193 B8M)
- Dimensions
- ASME B18.2.1 · DIN 931 / 933 (legacy DIN)
- Grade
- SS 316 / 316L · UNS S31603
- Best at
- Chloride-bearing process fluids, marine air and pharmaceutical service
SS 316 / 316L Hex Bolt Specification
| Product | SS 316 / 316L Hex Bolt |
|---|---|
| Finished fastener specification | ASTM A193 B8M where specified |
| Material / feedstock specification | Within the finished specification (A193 B8M) |
| Dimensional standard | ASME B18.2.1 · DIN 931 / 933 (legacy DIN) |
| 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 (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 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 (legacy DIN) where an older specification calls for them.
- Partially or fully threaded
- ASME B18.2.1 / DIN 931 / DIN 933
- Supplied with nuts and washers
More on choosing: Hex bolt guide.
SS 316 / 316L Hex Bolt: Why 316L 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 (legacy DIN) where an older specification calls for them. In SS 316 / 316L, 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 316 / 316L is picked for chloride-bearing process fluids, marine air and pharmaceutical service. |
|---|---|
| Typical service | Chemical & process — Piping and vessels handling mild acids and chlorides. |
| Bolting | ASTM A193 B8M studs with A194 8M nuts |
SS 316 / 316L Hex Bolt Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Molybdenum | 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 S31603.
SS 316 / 316L Hex 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 S31603 — Annealed plate & sheet (316L).
Full chemistry, properties and equivalents are on the SS 316 / 316L grade page.
Other SS 316 / 316L fasteners
SS 316 / 316L 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 316 / 316L hex bolts?
ASTM A194 8M heavy hex nuts.
Which standard covers SS 316 / 316L hex bolts?
Finished fastener specification: ASTM A193 B8M where specified. Material / feedstock: Within the finished specification (A193 B8M). Dimensions: ASME B18.2.1 · DIN 931 / 933 (legacy DIN). State the finished specification, material and dimensions on your purchase order or project drawing.
What decides the price of a SS 316 / 316L 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 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