Njabulo Stainless is a top-notch manufacturer and supplier of Stainless Steel 317 Nuts, proudly based in Cape Town, South Africa. The company focuses on crafting high-quality austenitic stainless steel fasteners that boast outstanding corrosion resistance, impressive strength, and long-lasting durability. Their Stainless Steel 317 Nuts are specifically engineered for tough industrial, chemical, petrochemical, and marine environments where protection against pitting and crevice corrosion is essential. With state-of-the-art manufacturing facilities and rigorous quality control measures, Njabulo Stainless delivers precision-engineered nuts that adhere to international standards, ensuring secure and enduring fastening solutions for machinery, equipment, and structural assemblies.
These Stainless Steel 317 Nuts are primarily made up of iron, chromium (18–20%), nickel (11–15%), molybdenum (3–4%), along with trace amounts of manganese, silicon, and carbon (capped at 0.08%). This particular grade of austenitic stainless steel offers remarkable corrosion resistance, especially in the face of aggressive chemicals and environments rich in chlorides, all while maintaining high tensile strength and toughness. These nuts showcase a tensile strength ranging from about 520–720 MPa, a yield strength of around 210–310 MPa, and good elongation properties, making them perfect for high-stress fastening tasks in chemically aggressive and marine settings.
| Material | Specification | Standards | Size | Length |
| Stainless Steel 317 Nuts | IS BS ASTM | ASTM / ASME – A/ SA 193 | 3 mm to 200 mm | M02 to M33 |
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | N |
| SS 317 | 0.08 max. | 2.00 max. | 1.00 max. | 0.045 max. | 0.03 max. | 18.0 – 20.0 | 11.0 – 14.0 | 3.0 – 4.0 | – |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | ||
| Rockwell B (HR B) max | Brinell (HB) max | |||||
| 317 | 620 MPa | 275 MPa | 45% | 85 | 193 | – |
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A corrosion-resistant product, Stainless Steel 317 nuts come in sizes from M6 to M64. They are designed for superior resistance to marine and chemical environments, providing reliability and durability in aggressive conditions.
A corrosion-resistant product, Stainless Steel 317 coupling nuts, available in sizes from M6 to M36, connect two male threads securely. Their high resistance to pitting and chloride environments makes them suitable for harsh industrial applications.
A corrosion-resistant product, Stainless Steel 317 nylon insert nuts, or lock nuts, come in sizes from M3 to M36. The nylon insert prevents loosening due to vibration, while the stainless steel offers excellent resistance to corrosion in marine and chemical environments.
A corrosion-resistant product, Stainless Steel 317 flange hex nuts feature an integrated flange and are available in sizes from M5 to M20. They provide superior load distribution and stability in corrosive and marine environments.
A corrosion-resistant product, Stainless Steel 317 heavy hex nuts are available in sizes from M10 to M48. Their increased thickness offers enhanced strength and durability, making them ideal for heavy-duty applications in aggressive environments.
A corrosion-resistant product, Stainless Steel 317 square nuts come in sizes from M6 to M30. They offer a larger contact surface for secure fastening and are ideal for high-stress applications in marine and chemical environments.
We ensure our Stainless Steel 317 Nuts to be covered under full range certifications to provide highest quality assurance. Our shipment package would include commercial invoices, packaging lists, fumigation certificates, and heat treatment charts along with quality assurance plans and laboratory test reports. Besides, we also offer other test certificates solely for our Stainless Steel 317 Nuts. We consider these certificates MTC according to EN 10204/3.1b, PMI Test Certificate, 100% radiography test report, and Third-Party Inspection Certificate. Thus, we promise 100% client satisfaction by providing them with these elaborate certificates.
Stainless Steel 317 Nuts find their place in various industries that demand exceptional corrosion resistance and mechanical performance. They are particularly suited for chemical and petrochemical plants, marine equipment, pharmaceutical and food processing systems, and piping that endures harsh or chloride-laden environments. Moreover, they are utilized in heat exchangers, structural assemblies, and industrial machinery where robust and corrosion-resistant fastening is crucial. The blend of strength, reliability, and resistance to pitting and crevice corrosion makes 317 nuts a go-to choice for challenging industrial, chemical, and marine applications.
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