Njabulo Stainless stands out as a top-notch manufacturer and supplier of SMO 254 bolts right in Cape Town, South Africa. They cater to industries that need high-strength, corrosion-resistant fasteners. These bolts are made from SMO 254 (UNS S31254), a super-austenitic stainless steel that boasts remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in environments rich in chlorides. Njabulo Stainless provides a wide variety of SMO 254 bolts, including hex bolts, flange bolts, and stud bolts, all designed to meet the rigorous demands of offshore, chemical processing, and desalination applications.
Crafted to meet international standards, Njabulo Stainless’s SMO 254 bolts showcase outstanding mechanical properties, such as high tensile strength and excellent fatigue resistance. Their superior corrosion resistance guarantees durability and reliability in tough environments, making them perfect for marine structures, heat exchangers, and chemical reactors. The company’s dedication to quality and precision means that every bolt meets the highest specifications, offering clients robust and trustworthy fastening solutions.
| Specifications of 254 SMO Fasteners | ASTM A479 & ASME SA479 |
| Standard of 254 SMO Fasteners | DIN, ASTM, BS and all International Standards |
| Length of 254 SMO Fasteners | 3 mm to 200 mm |
| 254 SMO Nuts Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| 254 SMO Bolt / Screw Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| 254 SMO Machine Screws Size | M1.6 – M12 |
| 254 SMO Washers Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Stainless Steel Grades | SMO 254 |
| 254 SMO Fasteners Type | Socket Screw, Hex Set Screw, Cap Screw, Machine Screw, Wing Screw, Spring Washers, Washers, Studs, Marine Anchors, Anchors, Hexagon Nut,U- Bolts, Anchor Bolt, Mushroom Head Square Neck Bolts, J Bolts,Eye Bolt,Structural Bolts, Bolts, Nuts, Sockets, Screws, Allen Cap screw, Nut, Hex Coupling Nut, Hex Nut, Square Nut, Hex Domed Cap Nuts, Hex Head Bolts, Stud Bolts, Socket Hexagon Head Screw, Pan Head Screw, Socket Head Cap Screw, Wing Screw, T-Head Bolts, Foundation Bolts,Screw, Studs |
| 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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SMO 254 bolts are high-performance fasteners made from super duplex stainless steel, offering exceptional corrosion resistance and strength. Ideal for marine, chemical, and high-temperature applications, they ensure durability and reliability.
F44 SMO 254 bolts are high-performance fasteners made from super duplex stainless steel grade F44. They offer superior corrosion resistance and strength, suitable for marine, chemical, and high-temperature applications.
ASTM A479 UNS S31254 bolts are high-strength fasteners made from super duplex stainless steel. They provide excellent corrosion resistance and durability, suitable for demanding applications in marine, chemical, and high-temperature environments.
UNS S31254 hex bolts are high-strength fasteners made from super duplex stainless steel. They feature a hexagonal head for secure tightening and offer excellent corrosion resistance in demanding marine and industrial applications.
F44 SMO 254 hex bolts are high-performance fasteners made from super duplex stainless steel F44. They feature a hexagonal head, offering superior corrosion resistance and strength for marine and chemical applications.
1.4547 bolts are made from super duplex stainless steel, offering exceptional corrosion resistance and strength. Ideal for harsh environments like marine and chemical industries, they provide durability and high performance.
Our quality control team conducts very intensive destructive and non-destructive tests after manufacture. Bolt efficiency and reliability have been guaranteed utilizing advanced tools and techniques on SMO 254 bolts. These quality controls ensure that each bolt meets the highest applicable standards for industrial applications. Once approved bolts, we pack them up tightly and in using suitable materials for safety in transit. We ensure smooth and timely delivery for our valued customers without any delay. Besides, we provide all the required documentation at the time of delivery for the customer’s convenience, to further build trust and transparency.
You’ll find Njabulo Stainless’s SMO 254 bolts being used in crucial infrastructure projects, including offshore oil and gas platforms, seawater desalination plants, and chemical processing units. Their ability to endure harsh conditions and corrosive materials makes them a go-to choice for engineers and procurement specialists looking for reliable and cost-effective fastening solutions. With a strong emphasis on customer satisfaction and prompt delivery, Njabulo Stainless remains a trusted partner for industries throughout South Africa.







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