Andre Stainless, based in Pulau Ujong, Singapore, is a renowned manufacturer and supplier of high-quality Stainless Steel 440C Nuts, known for their strength, precision, and reliability. With a focus on quality and international standards, we have established a firm reputation in domestic as well as international markets. Our 440C nuts are designed to perform in the most challenging industrial uses, such as marine, aerospace, automotive, and oil & gas industries. At Andre Stainless, we combine exceptional craftsmanship, quality management, and customer-centric service to provide fasteners that conform to rigid specifications and provide long-term performance in extremely demanding conditions.
440C Stainless Steel Nuts consist of a high-carbon martensitic alloy with 16–18% chromium and 0.95–1.20% carbon, providing exceptional hardness, resistance to wear, and moderate corrosion protection. These nuts are heat-treated to a hardness of up to 60 HRC, placing them among the hardest available stainless steels. They have high tensile strength, good fatigue life, and dimensional stability under heavy stress. While not suitable for highly corrosive or chloride-containing environments, 440C possesses an ideal combination of hardness and performance where durability and strength are paramount.
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.
440C Stainless Steel Nuts are suited to applications of high stress involving higher hardness, strength, and wear resistance. They are used in aerospace hardware, industrial equipment, cutting tools, and valve systems. In shipbuilding and oil and gas applications, they are appreciated for their high-pressure and mechanical wear resistances. Their performance under thermal and high-load conditions makes them a choice for use in automotive assemblies and aerospace fittings. Despite a moderate resistance to corrosion, they have good resistance to abrasion and their strength remains high at high temperatures, making them dependable where there is friction, vibration, and mechanical shock—maintaining stable performance for long periods.







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