Based in Delhi, India, Harshita Stainless is a well-known producer and supplier of 347H stainless steel nuts, providing premium fastening solutions for corrosive and high-temperature environments. These nuts are perfect for demanding industrial applications because of their exceptional mechanical strength, resistance to intergranular corrosion, and improved creep properties. Serving customers in sectors including petrochemicals, power generation, aerospace, and chemical processing, Harshita Stainless guarantees precisely engineered products that satisfy international standards. The business offers Stainless Steel 347H Nuts in a range of sizes and finishes that are customised to meet project-specific needs, all while maintaining a strong commitment to quality, performance, and customer satisfaction.
For increased high-temperature strength, stainless steel 347H nuts have a higher carbon content (up to 0.10%) than regular 347 and are made of columbium (niobium), nickel (9–13%), and chromium (17–20%) stabilisers. These nuts have outstanding resistance to oxidation and intergranular corrosion. They have a mechanical tensile strength of about 515 MPa, a yield strength of about 205 MPa, and an elongation of about 35%. 347H is perfect for high-temperature fastening applications in environments with high pressure and heat because it retains structural integrity under thermal stress.
| Specifications | : | ASTM A 193 ASME SA 193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347H | min. | 0.04 | – | – | – | – | 17.0 | 3.00 | 9.0 | – |
| max. | 0.10 | 2.0 | 1.00 | 0.045 | 0.030 | 19.0 | 4.00 | 13.0 | – | |
| 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 | ||||
| 347H | 515 | 205 | 40 | 92 | 201 |
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A corrosion-resistant product, Stainless Steel 347H nuts are available in sizes ranging from M6 to M64. They are designed for high-temperature applications, offering excellent creep resistance and stability in extreme conditions, suitable for aerospace and power generation industries.
A corrosion-resistant product, Stainless Steel 347H coupling nuts connect two male threads and come in sizes from M6 to M36. They provide high strength and thermal stability, making them ideal for high-temperature applications in industrial and aerospace settings.
A corrosion-resistant product, Stainless Steel 347H nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert prevents loosening under vibration, providing reliable performance in high-temperature environments where stability and security are crucial.
A corrosion-resistant product, Stainless Steel 347H flange hex nuts feature a built-in washer-like flange and come in sizes from M5 to M20. They offer enhanced load distribution and stability in high-temperature applications, ensuring durability and reliability.
A corrosion-resistant product, Stainless Steel 347H heavy hex nuts are larger and thicker, available in sizes from M10 to M48. They provide increased strength and thermal stability, making them suitable for heavy-duty and high-temperature industrial applications.
A corrosion-resistant product, Stainless Steel 347H square nuts have a larger surface area for contact, available in sizes from M6 to M30. They are ideal for high-temperature applications that require secure fastening in confined spaces and robust performance.
Stainless Steel 347H Nuts are packed in heavy-duty materials such as wooden boxes and pallets to prevent the nuts from external damage. Our product is hand-packed, and hence the Nuts are free from scratches or dents. The finished product reaches the client in excellent condition, and customers are consistently satisfied and impressed by the performance and long-lasting features of the Stainless Steel 347H Nuts.
347H Stainless Steel Nuts are frequently utilised in corrosive and high-temperature applications where mechanical dependability is essential. They are utilised in reactor systems, boilers, and heat exchangers in the petrochemical and refinery industries. They are used in high-pressure vessels, superheaters, and turbine parts in power plants. Because of their strength and resilience to heat fatigue, they are used in the marine and aerospace industries. These nuts are also used in exhaust systems and equipment used in chemical processing. They ensure long-term performance and safety in welded structures subjected to cyclic heating and corrosive conditions because of their resistance to sensitisation and oxidation.
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