SS 347 Hex NutASTM A193 · ASME B18.2.2 · Manufacturer, stockist & exporter, India
AISI 347 · UNS S34700
An SS 347 hex nut is a standard hexagon nut, made from SS 347 to ASTM A193 B8C. Standard hex nuts for general bolting, to ASME B18.2.2 or DIN 934 / ISO 4032.
- ASTM A193
- ASME B18.2.2
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 347 Hex Nut?
- What it is
- A standard hexagon nut
- Material
- ASTM A193 B8C
- Dimensions
- ASME B18.2.2 · DIN 934
- Grade
- SS 347 · UNS S34700
- Best at
- Welded high-temperature piping in refineries and power plants
SS 347 Hex Nut Specification
| Product | SS 347 Hex Nut |
|---|---|
| Material standard | ASTM A193 B8C |
| Dimensional standard | ASME B18.2.2 · DIN 934 |
| 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 Nut
Standard hex nuts for general bolting, to ASME B18.2.2 or DIN 934 / ISO 4032.
- ASME B18.2.2 · DIN 934
- Metric and inch
- Matching material to bolt
SS 347 Hex Nut Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 13.0 |
| Niobium | 10 × C min, 1.00 max |
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Phosphorus | 0.045 max |
| Sulphur | 0.030 max |
SS 347 Hex Nut 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 347 grade page.
Other SS 347 fasteners
SS 347 Hex Nut — questions buyers ask
Can I use a standard hex nut on flange studs?
Flange bolting normally specifies heavy hex nuts; standard hex nuts are for general joints.
Which standard covers SS 347 hex nuts?
The material is ASTM A193 B8C; dimensions follow ASME B18.2.2 · DIN 934. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 347 hex nut?
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