At Ananka Fasteners Pvt Ltd, we engineer, manufacture, and supply premium SS 347 (UNS S34700) Hex Bolt built for demanding service. Niobium-stabilised austenitic with excellent resistance to intergranular corrosion at high temperature. This technical datasheet covers the precise dimensional tolerances per ISO 4014 and the material requirements dictated by ASTM A193 Gr B8C Cl.1 and ASTM A276 / A479.
A SS 347 Hex Bolt uses a hexagonal head for wrench or socket tightening and is one of the most widely specified fastener forms in industrial assembly. The tables below provide the principal dimensions, equivalent material grades, chemical composition and mechanical properties covered by the technical data for this product.
Our hex bolts are manufactured in standard and custom configurations, ensuring a precise fit for demanding structural, piping, and chemical-process applications.
| Product Name | SS 347 Hex Bolt | Material Category | Stainless Steel |
| Material Grade | SS 347 (UNS S34700) | Fastener Spec | ASTM A193 Gr B8C Cl.1 |
| Dimension Spec | ISO 4014 | Material Spec | ASTM A276 / A479 |
| Thread Standard | ISO 261 / ISO 965 (Metric Coarse) | Thread Tolerance | 6g / 4g6g |
The ISO 4014 specification governs the physical geometry of this product. The tolerances below ensure a secure, reliable mate under service loads. ISO 4014 covers partially threaded metric hex bolts to the global ISO standard.
| Nominal Thread (d) | Pitch (mm) | Width Across Flats s (mm) | Width Across Corners e (min, mm) | Head Height k (mm) |
|---|---|---|---|---|
| M6 | 1.0 | 10.00 | 11.05 | 4.0 |
| M8 | 1.25 | 13.00 | 14.38 | 5.3 |
| M10 | 1.5 | 16.00 | 17.77 | 6.4 |
| M12 | 1.75 | 18.00 | 20.03 | 7.5 |
| M16 | 2.0 | 24.00 | 26.75 | 10.0 |
| M20 | 2.5 | 30.00 | 33.53 | 12.5 |
| M24 | 3.0 | 36.00 | 39.98 | 15.0 |
| M30 | 3.5 | 46.00 | 50.85 | 18.7 |
| M36 | 4.0 | 55.00 | 60.79 | 22.5 |
The hex head permits assembly with a standard wrench or socket. Buyers should confirm the required nominal diameter, thread series, length and thread class against the purchase drawing or applicable standard before ordering.
The UNS S34700 Hex Bolt is manufactured from SS 347, a stainless steel. The equivalent designations below assist with cross-referencing this material against European, British and other national standards.
| US / UNS | Werkstoff Nr. (DIN) | European (EN) | British Standard (BS) | Other / AFNOR |
|---|---|---|---|---|
| S34700 | 1.4550 | X6CrNiNb18-10 | 347 S31 | Z6 CNNb 18-10 (AFNOR) |
This section details the chemical composition limits and minimum mechanical properties governing SS 347 (UNS S34700) fasteners, as dictated by ASTM A193 Gr B8C Cl.1 (chemistry & mechanicals) and the raw bar/rod standard ASTM A276 / A479.
| Element | Composition, % |
|---|---|
| Chromium | 17.0–19.0 |
| Nickel | 9.0–13.0 |
| Niobium (Nb+Ta) | 10×C–1.0 |
| Carbon, max | 0.08 |
| Manganese, max | 2.0 |
| Silicon, max | 0.75 |
| Phosphorus, max | 0.045 |
| Iron | Balance |
| Condition / Temper | Tensile Strength min, psi (MPa) | Yield Strength min, psi (MPa) | Elongation min, % | Hardness |
|---|---|---|---|---|
| Annealed bar | 75 000 (515) | 30 000 (205) | 40 | – |
Our SS 347 hex bolts are specified across the following industries and service conditions, drawing on the material’s core strengths:
For applications exposed to highly aggressive chemicals or chloride-rich environments, the exact operating conditions should be reviewed against the certified data for this grade rather than general stainless steel assumptions.
Every batch of Hex Bolts produced undergoes rigorous internal and third-party testing to ensure zero-defect delivery. We supply complete traceability with our global shipments.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
This datasheet references ISO 4014 for dimensional requirements and ASTM A193 Gr B8C Cl.1 for material and fastener requirements. The applicable standard edition and purchase requirements should be confirmed for every project.
For ISO standards information, see the ISO standards catalogue. For ASTM International material and fastener specifications, see the ASTM International standards catalogue. These external references are provided for standards identification; the purchaser should verify the current edition applicable to the order.
A SS 347 Hex Bolt is an externally hex-driven bolt with a fully or partially threaded shank manufactured from SS 347 (UNS S34700). The product combines the ISO 4014 dimensional geometry with the ASTM A193 Gr B8C Cl.1 material and fastener requirements.
The dimensional information in this datasheet is based on ISO 4014, which governs the physical geometry of this product. The table above provides the principal dimensions listed for the SS 347 product range.
SS 347 is identified as UNS S34700. The equivalent designations listed in this datasheet include Werkstoff Nr. 1.4550, EN X6CrNiNb18-10, British Standard 347 S31, Z6 CNNb 18-10 (AFNOR).
SS 347 is a stainless steel known for good general corrosion resistance and wide industrial availability. For applications exposed to highly aggressive chemicals or chloride-rich environments, the exact operating conditions should be reviewed against the certified data for this grade rather than general stainless steel assumptions.
The product information supports standard and custom configurations. For a quotation, provide the required material grade, nominal size, dimensional requirement, quantity, standard and any inspection or certificate requirements.
Need a SS 347 Hex Bolt for an industrial project? Send the required size, quantity, standard and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: SS 347 / UNS S34700, nominal size, ISO 4014 requirement, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
