Located in Mumbai, India, Harsh Metalloys is a top producer and supplier of high-end stainless steel 310H nuts that are especially made for industrial applications involving high temperatures and stress. Our SS 310H nuts are produced with premium raw materials and cutting-edge manufacturing processes to guarantee exceptional strength, resistance to corrosion, and heat tolerance. These nuts are a reliable option for crucial operations in a variety of sectors because they meet international quality standards. Harsh Metalloys continues to provide dependable fastening solutions for demanding environments to both domestic and international markets with an emphasis on quality, accuracy, and customer satisfaction.
The higher carbon content (≥0.04%) and 24–26% chromium and 19–22% nickel in stainless steel 310H nuts improve their creep resistance and high-temperature strength. These nuts retain their mechanical stability under heat stress and have outstanding oxidation resistance up to 1100°C. Mechanical characteristics include a 40% elongation, a yield strength of 205 MPa, and a tensile strength of roughly 515 MPa. SS 310H nuts are appropriate for use in pressure-retaining components subjected to extended high-temperature service conditions because they combine exceptional structural integrity with resistance to thermal degradation.
| Specifications | DIN, ISO ,JIS ,GB, IS, BS, ASTM |
| Standard | ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472 |
| Size | M0.2 to M33 | 3/6″ to 2″ | Custom Sizes |
| Length | 3 mm to 200 mm | Custom Sizes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, 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 |
| SS 310H | 0.10 max | 2.00 max | 1.00 max | 0.045 max | 0.030 max | 24.0 – 26.0 | – | 19.0 – 21.0 | – |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness Rockwell B (HR B) max | Hardness Brinell (HB) max |
| 310H | 515 | 205 | 40 | 217 | 92 |
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A corrosion-resistant product, Stainless Steel 310H nuts are available in sizes from M6 to M64. They offer excellent heat and oxidation resistance, making them ideal for high-temperature applications in industrial furnaces and chemical processing.
A corrosion-resistant product, Stainless Steel 310H coupling nuts, used to join two male threads, come in sizes from M6 to M36. Their high-temperature resistance and durability make them suitable for demanding industrial and aerospace applications.
A corrosion-resistant product, Stainless Steel 310H nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert prevents loosening under vibration, providing secure fastening in high-temperature environments.
A corrosion-resistant product, Stainless Steel 310H flange hex nuts feature an integrated flange and are available in sizes from M5 to M20. They distribute load evenly and offer stability in high-temperature and corrosive environments.
A corrosion-resistant product, Stainless Steel 310H heavy hex nuts come in sizes from M10 to M48. Their thicker design provides increased strength and heat resistance, ideal for heavy-duty and high-temperature applications.
A corrosion-resistant product, Stainless Steel 310H square nuts offer a larger surface area for contact and come in sizes from M6 to M30. They are suitable for high-temperature and heavy clamping applications where stability is essential.
For use in corrosive and high-temperature settings, stainless steel 310H nuts are perfect for a variety of industries. They are frequently used in petrochemical facilities, thermal processing units, power generation systems, and heat treatment plants. These nuts are necessary for securing parts in reactors, exhaust systems, incinerators, boilers, and superheaters. They are appropriate for chemical processing facilities, furnace assemblies, and high-pressure piping systems due to their increased strength and resistance to oxidation. In refinery applications and flue gas systems, SS 310H nuts guarantee strong, long-lasting connections under harsh circumstances involving heat, stress, and corrosive substances.
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