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Stainless Steel 904L Fasteners are manufactured from a high-alloy austenitic stainless steel containing significant amounts of chromium, nickel, molybdenum, and copper, along with carefully controlled levels of carbon, manganese, silicon, phosphorus, sulfur, and other alloying elements. This carefully balanced chemistry gives the material excellent resistance to severe corrosive environments, particularly those containing sulfuric acid and other aggressive chemical media. The high nickel content helps maintain a stable austenitic structure while contributing to toughness and resistance to stress-related corrosion, whereas chromium provides strong protection against general corrosion and oxidation. Molybdenum improves resistance to pitting, crevice corrosion, and localized attack, while the addition of copper further enhances performance in reducing acids, especially sulfuric acid environments.
This combination of alloying elements gives Stainless Steel 904L Fasteners a valuable balance of excellent corrosion resistance, good mechanical strength, toughness, ductility, durability, and reliable performance in aggressive service conditions. These fasteners can be supplied in various sizes, thread configurations, lengths, dimensional tolerances, grades, and surface finishes to meet specific assembly and engineering requirements. Their ability to withstand harsh chemical exposure, chloride-containing environments, and acidic service conditions makes Stainless Steel 904L Fasteners suitable for chemical processing, petrochemical plants, pharmaceutical equipment, pollution-control systems, oil and gas, marine applications, pulp and paper processing, seawater handling, heat-treatment equipment, and other demanding industrial environments where long-term corrosion resistance and fastening reliability are essential.
In the solution-annealed condition, Stainless Steel 904L Fasteners provide an excellent combination of corrosion resistance, mechanical strength, toughness, ductility, and long-term durability, making them suitable for demanding industrial assemblies. They are particularly effective in environments exposed to sulfuric acid, chlorides, seawater, acidic solutions, and other highly corrosive chemical media where conventional stainless steel fasteners may not provide sufficient resistance. The alloy’s high chromium content supports protection against general corrosion and oxidation, while its elevated nickel and molybdenum levels improve resistance to stress corrosion, pitting, crevice corrosion, and localized attack. The addition of copper further enhances the material’s resistance to reducing acids, especially sulfuric acid, allowing 904L fasteners to maintain dependable performance in aggressive service conditions.
Stainless Steel 904L Fasteners are widely used in chemical processing plants, petrochemical facilities, pharmaceutical equipment, oil and gas installations, marine and offshore systems, pollution-control equipment, pulp and paper plants, seawater handling systems, heat exchangers, and specialized process equipment. Depending on the assembly requirements, they can be supplied as bolts, nuts, screws, studs, threaded rods, washers, and other precision fastening components. Their combination of excellent corrosion resistance, mechanical reliability, toughness, dimensional stability, and durability makes them well suited for critical fastening applications where secure assembly and long-term performance are essential under severe operating conditions.
| 904L Fasteners Specifications | ASTM F593, F594, F1554 / ASME SF593, F594, F1554 |
|---|---|
| 904L SS Fasteners size | Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Washers Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Machine Screws Size : M1.6 – M12 Self Tapping Screw Size : No.2 – No. 14 |
| SS 904L Fasteners Length | 3 mm to 200 mm |
| SS 904L Studs, Bolts, Threads | UNF, BSW, BSF, METRIC, UNC, or as required |
| Standard of Stainless Steel 904L Fasteners | DIN : DIN 934, DIN 931, DIN 970, DIN 933 UTS : UNEF, NPT, UNC, UNS, UNF, NPTF ISO : JIS standards, ISO 4033, ISO 4032, ANSI – American National Standards Institute ASME B18.5 ANSI B 28.2.4 1M as per defined in ASME B16.5 standard SS 904L Stud Bolt length ANSI B 18.2.4 2M as per defined in ASME B18.2.2 SS 904L Hex nuts |
| Form of SS 904L Fasteners | Hex, Threading, Square, Round as per Gauge Etc. |
| Raw materials Source | JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc. |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Certification | Dual Certified As per ASTM & ASME Codes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Threads | Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically |
| Test Certificate of SS 904L Bolting | as per EN 10204 / 3.1 Manufacturer Test Certificate |
| Additional Certifications | PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
| Production process | M24-M100: hot forging , M2-M24: Cold Froging, for custom-made connecting element machining and CNC |
| Head drive of SS 904L Bolts | Six-Lobe,Phillips,Phillips/Slot, Slotted etc |
| Packing of SS 904L Fasteners | IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request |
| Surface Coating | Ptfe Coated Stainless Steel 904L Fasteners Phosphate Coating Teflon Coating Zinc Coating Hot Dipped Galvanizing Coating Cadmium Coating Xylon Coating |
| Stainless Steel 904L Fasteners finishing | Stainless steel : Self-Colour, Passivated, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), Stainless Steel, Sherardized, some special one like DACROMET Geometry and Mechanically Applied coating ,Dacroment, nickel plated, anodizing, plated zinc-nickel Zinc (blue, black, yellow, white), black oxide, |
| ASTM A193 | ASTM A194 | ASTM F2281 |
| ASTM A193M | ASTM A194M | ASTM A962 |
| ASTM A320 | ASTM F593-13a | ASTM A962M |
| ASTM A320M | ASTM F594-15 | |
| DIN 580 | DIN 6914 | DIN 6921 |
| DIN 582 | DIN 3570 | DIN 603 |
| DIN 444 | DIN 7990 | DIN 2510 |
| DIN 939 | DIN 1B | DIN 976 |
| DIN 933 | DIN 529 | DIN 912 |
| DIN 931 | DIN 6325 |
| Products | Size | |
| ASTM A193 / A194 904L SS Stud Bolt | ASTM A193 / A194 904L SS Bolts | Sizes M3 – M56 | 3/6″ to 2″ |
| ASTM A193 / A194 904L SS Punched Washer | ASTM A193 / A194 904L Stainless Steel Pan Head Screw | |
| ASTM A193 / A194 904L Stainless Square Nut | ASTM A193 / A194 904L SS Insert Nuts | |
| ASTM A193 / A194 904L SS Welding Studs | ASTM A193 / A194 904L SS Pan Head Screw | |
| ASTM A193 / A194 904L Stainless Cap Screw | ASTM A193 / A194 904L Stainless Foundation Bolts | |
| ASTM A193 / A194 904L SS Threaded Rod | ASTM A193 / A194 904L Stainless Hex Head Bolts | |
| ASTM A193 / A194 904L Stainless Nuts | ASTM A193 / A194 904L Stainless Washers | |
| ASTM A193 / A194 904L SS Fender Washer | ASTM A193 / A194 904L SS Lock Nut | |
| ASTM A193 / A194 904L SS Countersunk Slotted Screw | ASTM A193 / A194 904L SS Double Ended Stud | |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | KS | AFNOR | EN |
| SS 904L | 1.4539 | N08904 | SUS 904L | 904S13 | STS 317J5L | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
| SS 904L | 0.020 max | 2.00 max | 1.00 max | 0.040 max | 0.030 max | 19.00 – 23.00 | 4.00 – 5.00 max | 23.00 – 28.00 | 1.00 – 2.00 |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.95 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 35 % |
Stainless Steel 904L Fasteners are available in a wide range of configurations, including bolts, nuts, screws, studs, threaded rods, washers, and other specialized fastening forms, depending on the assembly design, dimensional requirements, service conditions, and customer specifications. These fasteners are manufactured and supplied in accordance with recognized material and product standards to maintain consistent chemical composition, mechanical properties, dimensional accuracy, thread quality, and surface condition. Depending on the specific fastener type and applicable requirements, Stainless Steel 904L Fasteners can be supplied to relevant ASTM and ASME specifications, with suitable material conditions and finishing requirements selected according to the intended application.






Stainless Steel 904L Fasteners can be supplied against customer drawings, technical specifications, inspection and test plans, testing requirements, material certificates, and project-specific standards. Where required, we can also support additional inspection, testing, documentation, and third-party verification to satisfy specific project quality requirements. Our focus on consistent product quality and accurate fulfillment helps ensure reliable performance in applications exposed to aggressive chemicals, acidic media, chlorides, and other corrosive conditions. For product details, technical specifications, or customized requirements, email us at info@jaihindmetal.com.
Depending on the required configuration, they can be supplied and used as bolts, nuts, screws, studs, threaded rods, washers, and other precision fastening components for equipment and structural assemblies. The alloy’s high resistance to pitting, crevice corrosion, stress-related corrosion, and acidic attack helps maintain fastening integrity when exposed to demanding operating environments. The addition of molybdenum and copper provides enhanced resistance to localized corrosion and reducing acids, while the alloy’s austenitic structure supports good toughness and ductility. With their combination of excellent corrosion resistance, mechanical strength, toughness, durability, dimensional stability, and reliable service performance, Stainless Steel 904L Fasteners are well suited for applications where secure fastening and long-term material reliability are critical.
Looking for high-quality industrial products manufactured to your specific requirements? Contact our team for product details, customized solutions, pricing, and timely delivery.
Email: info@jaihindmetal.com
Our high-performance metal products are engineered to meet the demanding requirements of industries operating in challenging environments, including extreme temperatures, pressure and corrosive conditions.
Our corrosion-resistant metal products are widely used in marine environments where exposure to seawater, salt spray and harsh atmospheric conditions demands exceptional durability and reliability.
Our nickel alloys and high-performance metal products are used throughout the oil and gas industry for demanding applications involving high pressure, corrosive fluids, sour gas and extreme operating conditions.
Our corrosion-resistant alloys provide dependable performance in chemical processing equipment exposed to aggressive chemicals, high temperatures and challenging process conditions.
High-strength nickel alloys and specialty metals are selected for aerospace applications where lightweight performance, strength and resistance to extreme temperatures are essential.
Our specialty metal products support power generation equipment operating under high temperatures, pressure and corrosive conditions, delivering reliable long-term performance.
Corrosion-resistant metals are ideal for salt production environments where continuous exposure to concentrated salt and moisture can severely affect conventional materials.
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