Njabulo Stainless is a top-notch manufacturer and supplier of Stainless Steel 422 Nuts, proudly based in Cape Town, South Africa. The company focuses on crafting high-quality stainless steel fasteners that boast remarkable corrosion resistance, impressive strength, and long-lasting durability. Their Stainless Steel 422 Nuts are specifically engineered for tough industrial, chemical, and marine applications where both mechanical performance and resilience against harsh conditions are essential. With state-of-the-art manufacturing facilities and rigorous quality control measures, Njabulo Stainless ensures that their precision-engineered nuts meet international standards, providing secure and enduring fastening solutions for machinery, equipment, and structural assemblies.
These Stainless Steel 422 Nuts are primarily made up of iron, chromium (15–17%), nickel (11–13%), molybdenum (2–3%), along with trace amounts of manganese, silicon, and a maximum of 0.08% carbon. This martensitic-ferritic stainless steel grade delivers excellent tensile strength, hardness, and toughness, along with outstanding corrosion resistance in oxidizing and mildly aggressive environments. These nuts have a tensile strength ranging from about 850 to 1000 MPa, a yield strength of around 450 to 650 MPa, and good elongation properties, making them perfect for high-stress fastening tasks.
| 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 422 nuts come in sizes from M6 to M64. Known for high strength and wear resistance, they are suitable for aerospace and automotive applications requiring durability under high stress.
A corrosion-resistant product, Stainless Steel 422 coupling nuts, used to connect two male threads, are available in sizes from M6 to M36. Their high strength and heat resistance make them ideal for heavy-duty industrial applications.
A corrosion-resistant product, Stainless Steel 422 nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert prevents loosening due to vibration, making them ideal for high-stress applications.
A corrosion-resistant product, Stainless Steel 422 flange hex nuts feature an integrated flange and come in sizes from M5 to M20. They provide load distribution and stability, suitable for high-stress and high-temperature environments.
A corrosion-resistant product, Stainless Steel 422 heavy hex nuts are available in sizes from M10 to M48. Their thicker design offers increased strength and durability, ideal for heavy-duty and high-stress applications.
A corrosion-resistant product, Stainless Steel 422 square nuts provide a larger contact surface and come in sizes from M6 to M30. They are suitable for high-stress and heavy clamping applications where stability is crucial.
Njabulo Stainless ensures high-quality material with rigorous testing, such as hardness, spectro analysis, PMI, tensile, micro and macro structural, pitting resistance, and IGC testing. We assure superior performance through these checks. In addition to our quality commitment, we provide the following essential documentation: commercial invoices, packaging lists with weights, box numbers, labels, and a Certificate of Origin legalized by the Chamber of Commerce or Embassy. Our Third-Party Inspection Certificate ensures full customer satisfaction with the price and delivery of Stainless Steel 422 Nuts.
Stainless Steel 422 Nuts find their place in various industries that demand strong, corrosion-resistant fasteners. They are particularly well-suited for chemical and petrochemical plants, marine equipment, power generation, and industrial machinery. Additionally, you’ll find them in structural assemblies, piping systems, and equipment that face moderate corrosive environments and high mechanical loads. Their blend of mechanical strength, corrosion resistance, and reliability makes 422 nuts a go-to choice for critical fastening needs in challenging industrial and marine settings.
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