At Ananka Fasteners Pvt Ltd, we engineer, manufacture, and supply premium SS 904L (UNS N08904) Stud Bolt (Threaded Both Ends) built for demanding service. Super-austenitic stainless with high nickel and molybdenum for resistance to sulphuric acid and chloride environments. This technical datasheet covers the precise dimensional tolerances per ASME B16.5 and the material requirements dictated by ASTM F593 Group 3 and ASTM A276 / B649.
A SS 904L Stud Bolt is threaded on both ends to carry a nut at each side of a flange or pressure-boundary joint, and is a core component of bolted flange assemblies. The tables below provide the principal dimensions, equivalent material grades, chemical composition and mechanical properties covered by the technical data for this product.
Our stud bolts are manufactured in standard and custom configurations, ensuring a precise fit for demanding structural, piping, and chemical-process applications.
| Product Name | SS 904L Stud Bolt (Threaded Both Ends) | Material Category | Stainless Steel |
| Material Grade | SS 904L (UNS N08904) | Fastener Spec | ASTM F593 Group 3 |
| Dimension Spec | ASME B16.5 | Material Spec | ASTM A276 / B649 |
| Thread Standard | ASME B1.1 (UNC, UNF, 8UN) | Thread Tolerance | Class 2A / 3A |
The ASME B16.5 specification governs the physical geometry of this product. The tolerances below ensure a secure, reliable mate under service loads. Stud bolt diameter, quantity and length are set by the mating flange size and pressure class per ASME B16.5. Values shown are for raised-face flanges; ring-joint flanges require longer studs.
| Flange NPS | Bolt Dia (in) | No. of Bolts | Stud Length Class 150 (in) | Stud Length Class 300 (in) |
|---|---|---|---|---|
| 1/2″ | 1/2 | 4 | 2-1/4 | 2-1/2 |
| 3/4″ | 1/2 | 4 | 2-1/2 | 2-3/4 |
| 1″ | 1/2 | 4 | 2-1/2 | 3 |
| 1-1/2″ | 1/2 | 4 | 3 | 3-1/2 |
| 2″ | 5/8 | 4 | 3-1/2 | 4-1/4 |
| 3″ | 5/8 | 4 | 4 | 4-1/2 |
| 4″ | 5/8 | 8 | 4 | 5 |
| 6″ | 3/4 | 8 | 4-1/2 | 5-1/2 |
Threaded-both-ends studs are supplied to a specified overall length so that a nut can be run down each end of a flange or pressure-boundary joint. Buyers should confirm the required nominal diameter, thread series, overall length and thread length against the purchase drawing, flange rating and gasket requirement before ordering.
The UNS N08904 Stud Bolt (Threaded Both Ends) is manufactured from SS 904L, 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 |
|---|---|---|---|---|
| N08904 | 1.4539 | X1NiCrMoCu25-20-5 | 904 S13 | Z2 NCDU 25-20 (AFNOR) |
This section details the chemical composition limits and minimum mechanical properties governing SS 904L (UNS N08904) fasteners, as dictated by ASTM F593 Group 3 (chemistry & mechanicals) and the raw bar/rod standard ASTM A276 / B649.
| Element | Composition, % |
|---|---|
| Chromium | 19.0–23.0 |
| Nickel | 23.0–28.0 |
| Molybdenum | 4.0–5.0 |
| Copper | 1.0–2.0 |
| Carbon, max | 0.020 |
| Manganese, max | 2.0 |
| Silicon, max | 1.0 |
| Iron | Balance |
| Condition / Temper | Tensile Strength min, psi (MPa) | Yield Strength min, psi (MPa) | Elongation min, % | Hardness |
|---|---|---|---|---|
| Annealed bar | 71 000 (490) | 31 000 (215) | 35 | – |
Our SS 904L stud 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 Stud 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 ASME B16.5 for dimensional requirements and ASTM F593 Group 3 for material and fastener requirements. The applicable standard edition and purchase requirements should be confirmed for every project.
For ASME standards information, see the ASME 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 904L Stud Bolt (Threaded Both Ends) is a stud threaded on both ends for flange and pressure-boundary assembly manufactured from SS 904L (UNS N08904). The product combines the ASME B16.5 dimensional geometry with the ASTM F593 Group 3 material and fastener requirements.
The dimensional information in this datasheet is based on ASME B16.5, which governs the physical geometry of this product. The table above provides the principal dimensions listed for the SS 904L product range.
SS 904L is identified as UNS N08904. The equivalent designations listed in this datasheet include Werkstoff Nr. 1.4539, EN X1NiCrMoCu25-20-5, British Standard 904 S13, Z2 NCDU 25-20 (AFNOR).
SS 904L 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 904L Stud Bolt (Threaded Both Ends) 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 904L / UNS N08904, nominal size, ASME B16.5 requirement, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
