Njabulo Stainless stands out as a top-notch manufacturer and supplier of Stainless Steel 422 Nuts, proudly based in Cape Town, South Africa. This company is all about crafting high-quality stainless steel fasteners that are built to last, offering exceptional strength, durability, and resistance to corrosion. The Stainless Steel 422 Nuts from Njabulo Stainless are specifically designed to perform reliably even in the toughest environments, whether it’s industrial, chemical, or marine settings. With state-of-the-art manufacturing facilities and rigorous quality control measures, they ensure that every fastener is precision-engineered to meet international standards, providing secure and long-lasting connections for machinery, equipment, and structural assemblies across various industries.
These Stainless Steel 422 Nuts are made up of iron, chromium (15–17%), nickel (11–13%), molybdenum (2–3%), along with trace amounts of manganese, silicon, and carbon (capped at 0.08%). This particular martensitic/ferritic stainless steel grade boasts impressive tensile strength, hardness, and outstanding corrosion resistance, especially in oxidizing and mildly aggressive environments. With a tensile strength ranging from about 850 to 1000 MPa and a yield strength of around 450 to 650 MPa, these nuts are tough enough for heavy-duty fastening tasks.
| Material | Specification | Standards | Length | Size |
| 442 Stainless Steel Fasteners | IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | 3 mm to 200 mm | M 02 to M 160 |
| Component | Wt. % |
| C | 0.23 |
| Cr | 12.5 |
| Fe | 83 |
| Mn | 0.5 |
| Mo | 1 |
| Ni | 0.8 |
| P | 0.02 |
| S | 0.015 |
| Si | 0.38 |
| V | 0.23 |
| W | 1 |
| Mechanical Properties | Metric | English | Comments |
| Hardness, Brinell | 290 | 290 | Estimated from Rockwell C value for Brinell test with 3000 kg load/10 mm diameter ball |
| Hardness, Knoop | 315 | 315 | Estimated from Rockwell C value. |
| Hardness, Rockwell C | 30 | 30 | |
| Hardness, Vickers | 304 | 304 | Estimated from Rockwell C value. |
| Tensile Strength, Ultimate | 897 MPa | 130000 psi | |
| Tensile Strength, Yield | 828 MPa | 120000 psi | 0.2% Offset |
| Elongation at Break | 15 % | 15 % | |
| Reduction of Area | 40 % | 40 % |
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A corrosion-resistant product, Stainless Steel 442 nuts are available in sizes from M6 to M64. They are designed for high-temperature applications, providing excellent oxidation resistance and durability in harsh environments like industrial furnaces and heat exchangers.
A corrosion-resistant product, Stainless Steel 442 coupling nuts, used to join two male threads, come in sizes from M6 to M36. Their high-temperature and oxidation resistance make them ideal for extended connections in thermal processing and industrial applications.
A corrosion-resistant product, Stainless Steel 442 nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert secures the nut against vibration and movement, suitable for high-temperature environments requiring secure and reliable fastening.
A corrosion-resistant product, Stainless Steel 442 flange hex nuts feature an integrated flange and come in sizes from M5 to M20. They distribute load over a larger area, enhancing stability and performance in high-temperature and corrosive environments.
A corrosion-resistant product, Stainless Steel 442 heavy hex nuts are available in sizes from M10 to M48. Their increased thickness and strength make them suitable for heavy-duty and high-temperature applications, ensuring robust and secure fastening.
A corrosion-resistant product, Stainless Steel 442 square nuts offer a larger surface area for contact, available in sizes from M6 to M30. They are ideal for high-temperature and heavy clamping applications, providing stability and reliable performance in challenging environments.
Njabulo Stainless offers the best quality in its Stainless Steel 442 Nuts through hardness, spectrochemical analysis, PMI, micro and macro testing, flaring, pitting resistance, and IGC tests, all of which are provided as proofs that make it reach the very highest standards. We are able to offer full documentations-detailed commercial invoices, accurate packaging list, box number, and labels-and the legalized Certificate of Origin, Third-Party Inspection Certificate reflect the transparency of products. Our commitment to excellence and detailed processes ensure 100% client satisfaction in the quality and pricing of our products.
You’ll find Stainless Steel 422 Nuts being widely utilized in industries that demand robust, corrosion-resistant fasteners. They’re perfect for chemical and petrochemical plants, marine equipment, power generation, and industrial machinery. Plus, they play a crucial role in structural assemblies, piping systems, and equipment that face moderate corrosive conditions and high stress. Thanks to their blend of mechanical strength, corrosion resistance, and reliability, 422 nuts are the go-to choice for critical fastening needs in challenging industrial and marine environments.
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