Harsh Metalloys, located in Mumbai, India, is a well-respected manufacturer and supplier of top-notch Stainless Steel 304H Nuts. These high-performance nuts are made from high-carbon 304 stainless steel, providing outstanding mechanical strength along with excellent resistance to oxidation and corrosion, even at high temperatures. Built to comply with international standards like ASTM F594 and DIN specifications, 304H nuts are perfect for high-temperature industrial settings. Harsh Metalloys guarantees precise threading, rigorous quality control, and prompt delivery to cater to the fastening requirements of industries such as power generation, petrochemicals, oil and gas, and chemical processing.
Stainless Steel 304H Nuts are made up of Chromium (18–20%), Nickel (8–12%), and Carbon (0.04–0.10%), along with small amounts of Manganese (≤2%), Silicon (≤1%), Phosphorus (≤0.045%), and Sulfur (≤0.03%). The higher carbon content boosts strength and creep resistance at elevated temperatures. Typically, these nuts show a tensile strength of 515–620 MPa, yield strength around 205–275 MPa, an elongation of 40%, and a hardness close to 95 HRB. The composition of this alloy ensures remarkable performance at high temperatures, excellent corrosion resistance, and long-lasting durability in extreme conditions.
| 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.
Stainless Steel 304H Nuts are a go-to choice for high-temperature and high-pressure situations in various industries, including oil and gas, power generation, refineries, chemical processing, and marine engineering. These nuts ensure a secure fit in boilers, heat exchangers, superheaters, and furnace assemblies, where maintaining mechanical integrity and resisting thermal stress is essential. They’re also used in piping systems, pressure vessels, and structural components that face corrosive and high-heat conditions. With their impressive strength and resistance to oxidation, 304H nuts deliver dependable, long-lasting performance in crucial industrial operations.
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