Aditya Stainless has made a name for itself as a leading manufacturer and supplier of Stainless Steel 304H Nuts in Kolkata, India. They provide top-notch fastening solutions designed for high-temperature and high-stress applications. Crafted from SS 304H (UNS S30409), these nuts boast a higher carbon content than standard 304, which translates to improved strength, creep resistance, and durability in extreme heat. Perfect for boilers, heat exchangers, pressure vessels, and chemical processing plants, SS 304H Nuts come in various sizes and thread types, ensuring secure, corrosion-resistant fastening for both industrial and construction projects.
When it comes to composition and mechanical properties, Stainless Steel 304H Nuts are made up of 18–20% chromium, 8–11% nickel, and a higher carbon content (0.04–0.10%), which boosts their strength and oxidation resistance at high temperatures. These nuts deliver impressive tensile strength of ≥515 MPa and yield strength of ≥205 MPa, along with excellent creep resistance at temperatures exceeding 500°C. SS 304H maintains its structural integrity even under prolonged thermal exposure, making it a great fit for high-pressure systems. Plus, it offers good corrosion resistance, weldability, and fabrication properties, making 304H nuts a solid choice for demanding mechanical environments.
| Specifications | DIN, ISO ,JIS ,GB, IS, BS, ASTM |
| Standard | ASTM A193 / A194, ASME SA193 / SA194 |
| Size | M2 – M100 |
| Length | 3 mm to 200 mm | Custom Sizes |
| Dimensions Standard | DIN: DIN931, 933, 934, 7991, 976, 125 ISO: ISO 4033, 4032 ASME B18.5, B18.3 |
| Form | Hex, Threading, Square, Round as per Gauge Etc. |
| Threads | Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically |
| Threads available | UNF, BSW, BSF, METRIC, UNC, or as required |
| 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 |
| Test Certificate | As per EN 10204 / 3.1 Manufacturer Test Certificate, PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|---|
| 304H | min. | 0.04 | – | – | – | – | 18.0 | – | 8.0 | – |
| max. | 0.10 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | – | 10.5 | – | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304H | 515 | 205 | 40 | 92 | 201 |
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Stainless Steel 304H Nuts Designed for high-stress environments, these nuts provide excellent corrosion resistance and durability. Available in sizes ranging from M6 to M36, they are ideal for chemical, petrochemical, and power generation applications.
Stainless Steel 304H Coupling Nuts Ideal for joining threaded rods, these coupling nuts offer high strength and temperature resistance. Available in sizes from M6 to M36, they are suitable for industrial applications such as piping systems and machinery assemblies.
These nuts feature a nylon insert for secure fastening and vibration resistance. Available in sizes from M6 to M24, they ensure a tight fit and prevent loosening, making them perfect for machinery and automotive applications.
Featuring integrated flanges for extra support, these SS 304H nuts provide enhanced load distribution and stability. Available in sizes from M6 to M24, they are ideal for use in heavy-duty equipment and construction projects.
Offering superior strength for heavy-duty applications, these SS 304H nuts are designed for high-pressure and high-temperature environments. Available in sizes from M6 to M36, they are perfect for boilers and heat exchangers.
These square nuts provide a large surface area for effective torque application. Available in sizes from M6 to M24, they are ideal for secure fastening in tight spaces within industrial machinery and structural applications.
Aditya Stainless is committed to providing high-quality Stainless Steel 304H Nuts with consistent performance through a wide range of tests. These include hardness testing, spectro analysis, PMI, and flaring tests. We also do micro and macro tests, pitting resistance tests, and IGC tests to ensure the excellent quality of every product we deliver. Along with the above-mentioned stringent testing processes, we are giving full documentation like commercial invoices and detailed packing lists with net and gross weights, box numbers, and labels. Moreover, our legalized or attested Certificate of Origin and Third-Party Inspection Certificates make sure that there is total assurance of our commitment towards delivering superlative products and a guaranty of unforgettable customer satisfaction.
Stainless Steel 304H Nuts find their place in various applications that require high mechanical strength at elevated temperatures, including heat exchangers, superheaters, boilers, pressure vessels, and nuclear power systems. They’re also essential in chemical and petrochemical processing, refineries, and thermal plants, where resistance to oxidation and scaling is vital. In structural and piping systems that face high heat and pressure, 304H nuts guarantee reliable and long-lasting performance. Their blend of mechanical strength, corrosion resistance, and dimensional stability makes them perfect for both static and dynamic industrial applications.
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