Nakamura Stainless is a well-respected manufacturer and supplier based in Pulau Ujong, Singapore, focusing on high-performance stainless steel fasteners for critical applications. Their SMO 254 Nuts are top-of-the-line, corrosion-resistant nuts crafted for use in extremely aggressive environments, ensuring outstanding durability and mechanical strength. Made from SMO 254, a high-alloy austenitic stainless steel, these nuts excel in resisting pitting, crevice corrosion, and stress corrosion cracking. Engineered with precision to meet international standards, they guarantee reliable and secure fastening in chemical, petrochemical, marine, and offshore settings. SMO 254 Nuts are perfect for industries that require high-performance fasteners in tough operating conditions.
SMO 254 Nuts are made up of 20–22% chromium, 18–20% nickel, 6–7% molybdenum, along with trace amounts of nitrogen, iron, and other elements. This unique blend gives them remarkable corrosion resistance, especially in environments rich in chlorides and acids. On the mechanical side, SMO 254 Nuts showcase high tensile and yield strength, impressive toughness, and strong fatigue resistance. They hold their structural integrity even under high temperatures and harsh chemical exposure. The combination of their strength and exceptional corrosion resistance makes these nuts ideal for critical fastening applications where reliability and long-lasting performance are a must.
| Range | : | M10 TO M100 |
| Standards | : | ASTM / ASME SB 479 |
| Length | : | UPTO 5 METERS |
| Grade | : | UNS No. S31254 |
| Specification | : | IS, BS, ASTM |
| Type | : | Hot Forged and Cold Forged |
| SMO 254 | Ni | C | Mo | Mn | Si | Fe | Cu | S | P | Cr |
| 17.5 – 18.5 | 0.02 max | 6 – 6.5 | 1 max | 0.8 max | – | 0.5 – 1 | 0.01 max | 0.03 max | 19.5 – 20.5 |
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 8.0 g/cm3 | 1320-1390 ℃ | 300 | 650 | 35 % |
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Corrosion-resistant product designed for extreme environments. SMO 254 Nuts are available in sizes from M6 to M36, ideal for marine, chemical processing, and offshore applications requiring superior resistance to pitting and crevice corrosion.
SMO 254 Coupling Nuts are engineered for joining threaded rods in harsh conditions. Available in sizes from M6 to M36, they provide strong connections for marine and chemical processing systems, ensuring durability and resistance to severe environments.
Featuring a nylon insert for secure fastening, SMO 254 Nylon Insert Nuts come in sizes from M6 to M24. They are perfect for applications in corrosive environments where vibration resistance and a stable connection are essential.
SMO 254 Flange Hex Nuts offer enhanced load distribution with integrated flanges. Available in sizes from M6 to M24, they are suitable for heavy-duty applications in marine and chemical industries, providing robust support and corrosion resistance.
Engineered for high-stress applications, SMO 254 Heavy Hex Nuts are available in sizes from M6 to M36. They are ideal for use in demanding environments like offshore rigs and chemical processing facilities, offering exceptional strength and corrosion resistance.
SMO 254 Square Nuts feature a large surface area for effective torque application. Available in sizes from M6 to M24, they are ideal for secure fastening in tight spaces, particularly in marine and industrial settings where superior corrosion resistance is required.
We ensure that all the products are of high quality, including SMO 254 Nuts, with consistent performance verified through an extensive range of tests such as hardness testing, spectro analysis, PMI, and flaring tests. We also perform micro and macro tests, pitting resistance tests, and IGC tests to ensure superior quality in every material we deliver. We have beyond our strict testing procedure adequate documentation such as commercial invoices, packaging list with net and gross weight, box numbers and labels. In addition, the legalized or attested Certificate of Origin and Third-Party Inspection Certificates establish our firm’s decision to present quality products for customers with absolute satisfaction.
The use of SMO 254 nuts is in high-temperature conditions due to the excellent resistance it offers against holes and cracks, as well as corrosion. Typical applications include marine structures, chemical plants, and so oil products for marine use. Seawater resistance, chlorinated environments, and acidic conditions all call for its use, thus ensuring reliability and durability in conditions where good corrosion resistance and structural integrity are the most important requirement.
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