Njabulo Stainless, based in Cape Town, South Africa, is a trusted manufacturer and supplier of high-quality Stainless Steel 440C Nuts. These nuts are designed to provide secure, durable, and reliable fastening in demanding industrial, structural, and mechanical applications. Njabulo Stainless ensures precise threading, smooth surfaces, and consistent dimensions, allowing for tight and stable connections. Stainless Steel 440C nuts are widely used in automotive, chemical, petrochemical, marine, and heavy machinery industries, where high hardness, corrosion resistance, and mechanical strength are essential. They ensure long-lasting performance and safety under extreme operating conditions.
Stainless Steel 440C Nuts are made from martensitic stainless steel 440C, containing high carbon (0.95–1.20%) and chromium (16–18%). This composition provides exceptional hardness, wear resistance, and tensile strength, making them ideal for high-stress and high-load applications. Mechanically, 440C nuts offer excellent toughness, dimensional stability, and fatigue resistance, ensuring secure fastening even in vibration-prone or high-pressure environments. The precision threads allow for tight assembly, while the stainless steel maintains moderate corrosion resistance, providing reliable and long-lasting performance in industrial, automotive, and mechanical applications.
STAINLESS STEEL 440C NUTS SPECIFICATIONS |
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| Specifications | IS, BS, ASTM |
| Standard | ASTM / ASME – A/ SA 193 |
| Length | 3 mm to 200 mm |
| Size | M02 to M33 |
| Type | Hex Nuts, Dome Nuts, Hex Machine Screw Nuts, Hex Lock Nuts Nylon Insert, Hex Jam Nuts, Hex Jam Nylon Lock Nuts, Heavy Hex Nuts, Wing Nuts, Cap Nuts, Acorn Nuts, Square Nuts, K-Lock Nuts, Prevailing Torque Lock Nuts, Top Lock Nuts, Two-Way Reversible Lock Nuts, Pin-Lock Nuts, T-Nuts, Coupling Nuts, T-Slot Nuts, Castle Nuts, Flange Nuts Serrated, Machine Hex Nuts, Finished Hex Nuts, Forged Eye Nut, Rivet Nuts, Slotted Hex Nut, Acme Hex Nuts, Nylock Nuts, Anco Locknuts, Flexloc Nuts, Reversible Locknuts, Panel Nut, Poly Nut, Conelock Nut, Self Clinching Nuts, Domed Cap Nuts, Imperial Thread Nuts, Imperial Thread Nylock Nuts, Sleeve Nuts, Thin Nuts, Weld Nuts, High Tensile Nuts, Cage Nuts, Security Nuts, Imperial Nuts, Industrial Nuts, Miscellaneous Nuts, Insert Nuts, Knurled Nuts, Round Nuts |
| Element | SS 440C |
| Ni | – |
| C | 0.95 – 1.20 |
| Mn | 1.0 max |
| P | 0.040 max |
| S | 0.030 max |
| Si | 1.0 max |
| Cr | 16.0 – 18.0 |
| Mo | 0.75 |
| N | – |
| Element | SS 440C |
| Tensile Strength (MPa) min | 758 |
| Yield Strength 0.2% Proof (MPa) min | 448 |
| Elongation (% in 50mm) min | 14 |
| Hardness Rockwell (HR C) | 269HB max# |
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A corrosion-resistant product, Stainless Steel 440C nuts are available in sizes from M6 to M64. Known for their exceptional hardness and wear resistance, these nuts are ideal for high-stress, high-temperature applications in aerospace and industrial machinery.
A corrosion-resistant product, Stainless Steel 440C coupling nuts come in sizes from M6 to M36. They are designed to join two male threads securely, offering high strength and durability in demanding applications.
A corrosion-resistant product, Stainless Steel 440C nylon insert nuts, or lock nuts, are available in sizes from M3 to M36. The nylon insert prevents loosening under vibration, making them suitable for high-stress and high-temperature environments.
A corrosion-resistant product, Stainless Steel 440C flange hex nuts feature an integrated flange and are available in sizes from M5 to M20. They provide even load distribution and enhanced stability in harsh conditions.
A corrosion-resistant product, Stainless Steel 440C heavy hex nuts are available in sizes from M10 to M48. Their increased thickness offers superior strength and durability, making them ideal for heavy-duty and high-stress applications.
A corrosion-resistant product, Stainless Steel 440C square nuts come in sizes from M6 to M30. Their larger surface area ensures a secure grip and stable fastening in high-stress and industrial applications.
Our team has carefully packed these Stainless Steel 440C Nuts with strong materials in the market. Durable wooden boxes and pallets with eco-friendly packing materials have ensured that these nuts are not damaged; they remain clean, thus maintaining their superior quality. The nuts are thus shielded and protected while shipping; no damage occurs. Once packed, the nuts are set for delivery. We assure fast delivery in perfect condition regardless of the distance. We work with trustworthy shipping companies and are committed to efficiency and reliability. The attention to detail and strict quality checks are also a testament to our desire to provide you with the best.
Stainless Steel 440C Nuts are widely used in automotive, aerospace, chemical, petrochemical, marine, and heavy machinery industries. They are ideal for fastening bolts, studs, and threaded assemblies in high-stress, high-load, or vibration-prone environments. Their hardness and wear resistance make them suitable for precision machinery, pumps, valves, and industrial equipment. In chemical and marine applications, they provide corrosion resistance, ensuring secure and durable connections. 440C nuts are also used in construction, industrial machinery, and tooling assemblies, providing reliable, long-lasting fastening solutions where strength, precision, and resistance to wear are critical.
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