At Ananka Fasteners Pvt Ltd, we engineer, manufacture, and supply premium SS 316L (UNS S31603) Hex Nut built for demanding service. Low-carbon 316 — the most-specified marine and chemical fastener grade — resisting weld sensitisation. This technical datasheet covers the precise dimensional tolerances per ISO 4032 and the material requirements dictated by ASTM A194 Gr 8M and ASTM A276 / A479.
A SS 316L Hex Nut is the standard mating nut for general-purpose bolted assemblies and is manufactured to match the thread series of its corresponding bolt. 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 nuts are manufactured in standard and custom configurations, ensuring a precise fit for demanding structural, piping, and chemical-process applications.
| Product Name | SS 316L Hex Nut | Material Category | Stainless Steel |
| Material Grade | SS 316L (UNS S31603) | Fastener Spec | ASTM A194 Gr 8M |
| Dimension Spec | ISO 4032 | Material Spec | ASTM A276 / A479 |
| Thread Standard | ISO 261 / ISO 965 (Metric Coarse) | Thread Tolerance | 6H / 4H6H (Internal) |
The ISO 4032 specification governs the physical geometry of this product. The tolerances below ensure a secure, reliable mate under service loads. ISO 4032 governs style 1 metric hexagon nuts to the global ISO standard.
| Nominal Thread (d) | Pitch (mm) | Width Across Flats s (mm) | Width Across Corners e (min, mm) | Thickness m (Max, mm) |
|---|---|---|---|---|
| M6 | 1.0 | 10.00 | 11.05 | 5.2 |
| M8 | 1.25 | 13.00 | 14.38 | 6.8 |
| M10 | 1.5 | 16.00 | 17.77 | 8.4 |
| M12 | 1.75 | 18.00 | 20.03 | 10.8 |
| M16 | 2.0 | 24.00 | 26.75 | 14.8 |
| M20 | 2.5 | 30.00 | 32.95 | 18.0 |
| M24 | 3.0 | 36.00 | 39.55 | 21.5 |
The nut thread is manufactured to match the corresponding bolt thread series and class. Buyers should confirm the required nominal size, thread series and thread class against the purchase drawing or applicable standard before ordering.
The UNS S31603 Hex Nut is manufactured from SS 316L, 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 |
|---|---|---|---|---|
| S31603 | 1.4404 | X2CrNiMo17-12-2 | 316 S11 | Z3 CND 17-11-02 (AFNOR) |
This section details the chemical composition limits and minimum mechanical properties governing SS 316L (UNS S31603) fasteners, as dictated by ASTM A194 Gr 8M (chemistry & mechanicals) and the raw bar/rod standard ASTM A276 / A479.
| Element | Composition, % |
|---|---|
| Chromium | 16.0–18.0 |
| Nickel | 10.0–14.0 |
| Molybdenum | 2.0–3.0 |
| Manganese, max | 2.0 |
| Carbon, max | 0.030 |
| Silicon, max | 0.75 |
| Phosphorus, max | 0.045 |
| Sulfur, max | 0.030 |
| Iron | Balance |
| Condition / Temper | Tensile Strength min, psi (MPa) | Yield Strength min, psi (MPa) | Elongation min, % | Hardness |
|---|---|---|---|---|
| Annealed bar | 70 000 (485) | 25 000 (170) | 40 | 217 HB max |
Our SS 316L hex nuts 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 Nuts 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 4032 for dimensional requirements and ASTM A194 Gr 8M 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 316L Hex Nut is a standard hex-driven nut manufactured from SS 316L (UNS S31603). The product combines the ISO 4032 dimensional geometry with the ASTM A194 Gr 8M material and fastener requirements.
The dimensional information in this datasheet is based on ISO 4032, which governs the physical geometry of this product. The table above provides the principal dimensions listed for the SS 316L product range.
SS 316L is identified as UNS S31603. The equivalent designations listed in this datasheet include Werkstoff Nr. 1.4404, EN X2CrNiMo17-12-2, British Standard 316 S11, Z3 CND 17-11-02 (AFNOR).
SS 316L 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 316L Hex Nut 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 316L / UNS S31603, nominal size, ISO 4032 requirement, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
