Njabulo Stainless is a reliable manufacturer and supplier of Stainless Steel 321H Nuts, proudly based in Cape Town, South Africa. The company focuses on crafting top-notch austenitic stainless steel fasteners that boast impressive corrosion resistance, high-temperature strength, and long-lasting durability. Their Stainless Steel 321H Nuts have a higher carbon content compared to standard 321, which enhances their tensile strength and creep resistance, making them perfect for use in industrial, chemical, petrochemical, and power generation settings. 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.
These Stainless Steel 321H Nuts are primarily made up of iron, chromium (17–19%), nickel (9–13%), niobium (as a stabilizer), and carbon (0.04–0.10%), along with trace amounts of manganese and silicon. The increased carbon content boosts their high-temperature tensile strength and creep resistance, while niobium stabilization helps prevent intergranular corrosion during welding. These nuts typically exhibit a tensile strength of around 600–800 MPa, a yield strength of about 300–500 MPa, and demonstrate good elongation and toughness, making them well-suited for fastening applications in high-temperature and corrosive environments.
| Specifications Of | 321H Stainless Steel Nuts |
|---|---|
| Length Sizes | 3 millimeter to 200 millimeter |
| Head Type | Hex, Square |
| Head Style | Hex, Square |
| Standard | ASME B18.2.2 ASME B16.5 ASME B18.5 ANSI B 18.2.4 2M DIN = DIN 931, DIN 933, DIN 934, DIN 970 ISO = ISO 4033, ISO 4032, JIS UTS = UNF, NPTF, NPT, UNC, UNEF, UNS |
| Surface Coating | Hot Dipped Galvanizing Coated Nuts Phosphate Coated Nuts Zinc Coated Nuts Cadmium Coated Nuts Teflon Coated Nuts Xylon Coated Nuts |
| Type Of Nuts | Coupling Nuts, Serrated Flange Locknuts, Square Nuts, Heavy Hex Nuts, Flange Nuts |
Grade | Mn | N | P | C | S | Cr | Mo | Si | Ni | Other | |
Stainless Steel 321H Nuts | minimum maximum | 2.00 | – | 0.045 | 0.04 0.10 | 0.030 | 17.0 19.0 | – | 0.75 | 9.0 12.0 | Ti=4(C+N) 0.70 |
Grade | Tensile Strength (MPa) minimum | Yield Strength 0.2% Proof (MPa) minimum | Elongation (% in 50mm) minimum | Hardness | |
Rockwell B (HR B) maximum | Brinell (HB) maximum | ||||
321H Stainless Steel Fasteners | 515 | 205 | 40 | 95 | 217 |
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Corrosion-resistant product ideal for high-temperature applications. Stainless Steel 321H Nuts are available in sizes from M6 to M36, designed for use in aerospace and chemical processing environments, offering excellent heat and oxidation resistance.
Stainless Steel 321H Coupling Nuts are used to connect threaded rods in high-temperature settings. Sizes range from M6 to M36, suitable for applications in chemical processing and aerospace where heat resistance and durability are essential.
Stainless Steel 321H Nylon Insert Nuts feature a nylon insert to prevent loosening under high temperatures. Available in sizes from M6 to M24, they are ideal for applications in industrial machinery and exhaust systems where stability and heat resistance are crucial.
Stainless Steel 321H Flange Hex Nuts provide enhanced load distribution with their integrated flanges. Sizes range from M6 to M24, making them suitable for high-temperature environments like chemical processing and aerospace, offering both strength and corrosion resistance.
Stainless Steel 321H Heavy Hex Nuts are designed for high-stress and high-temperature applications. Available in sizes from M6 to M36, they are used in industrial machinery and aerospace components, providing exceptional strength and heat resistance.
Stainless Steel 321H Square Nuts offer a large surface area for effective torque application. Sizes range from M6 to M24, suitable for high-temperature and industrial applications, ensuring durability and stability in demanding environments.
We ensure complete documentation for our Stainless Steel 321H Nuts, which means transparency and reliability. Our documents include a commercial invoice, a packaging list, a fumigation certificate, a heat treatment chart, and a quality assurance plan. The package also includes an NABL-approved lab test report, confirming strict standards. Further, quality is demonstrated through many test certificates in the form of MTC according to EN 10204/3.1b, PMI Test Certificate, 100% radiography test report, and a third-party inspection certificate. These guarantee 100% client satisfaction along with confidence for the integrity of our products.
Stainless Steel 321H Nuts are extensively utilized in industries that demand high-temperature corrosion resistance and mechanical stability. They are particularly ideal for components in boilers, heat exchangers, superheaters, reheaters, pressure vessels, and piping systems within chemical and petrochemical plants. Moreover, they find applications in marine and power generation equipment, as well as in industrial machinery that faces extreme thermal and corrosive conditions. The combination of strength, creep resistance, and corrosion protection makes 321H nuts a top choice for challenging high-temperature and industrial applications.
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