Harsh Metalloys is a trusted manufacturer and supplier of Stainless Steel 420 Nuts in Mumbai, India, offering top-quality fastening solutions for mechanical, engineering, and structural applications. Stainless Steel 420 is a martensitic stainless steel grade known for its excellent hardness, wear resistance, and moderate corrosion resistance. These nuts are designed to provide strong mechanical fastening in high-stress and high-load environments. Harsh Metalloys supplies SS 420 nuts in various sizes, threads, and finishes, suitable for both industrial and commercial sectors. With precision engineering and reliable performance, our 420 stainless steel nuts are ideal for applications requiring strength and durability.
Stainless Steel 420 Nuts typically contain 12–14% chromium and have a higher carbon content (around 0.15%–0.40%) that enables heat treatment to achieve high hardness levels. The alloy provides a tensile strength of 700–850 MPa and excellent resistance to abrasion and impact. These nuts are magnetic in nature and can be hardened through heat treatment for enhanced mechanical strength. Harsh Metalloys ensures precise threading, consistent hardness, and surface quality, delivering nuts that maintain mechanical stability and dimensional accuracy under pressure and wear-prone environments.
| Specifications | : | ASTM A /SA 193 / 194 |
| Dimensions | : | ASTM,DIN, BS,GB, IS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Nuts size | : | M02 to M33 |
| Fe | C | Mn | Si | Cr | Ni* | Mo* | P | S | Cu* | Al* | Sn* |
|---|---|---|---|---|---|---|---|---|---|---|---|
Balance | 0.15-0.40% | 1.00% max | 1.00% max | 12.00-14% | 0.50% max | 0.50% max | 0.04% max | 0.03% max | 0.50% max | 0.15% max | 0.05% max |
| Property | Metric |
|---|---|
Density | 7.74 g/cm3 |
Elastic Modulus | 200 GPa |
Electrical Resistivity | 0.55 x 10-7 .m |
Tensile Strength | 655 MPa |
Yield strength (Temper: Annealed) Minimum 0.2% offset | 40,000 psi |
Yield Strength (Temper: Hardened + 350°F) Typical 2% offset | 195,000 psi |
Elongation (% in 50 mm) | 25 |
Brinell Hardness (HB) | 241 max |
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Corrosion-resistant product known for high hardness. Stainless Steel 420 Nuts are available in sizes from M6 to M36, suitable for applications where wear resistance and durability are crucial, such as in cutting tools and industrial machinery.
Stainless Steel 420 Coupling Nuts are designed for joining threaded rods, available in sizes from M6 to M36. They are used in applications requiring high hardness and resistance to wear, such as in machinery and automotive components.
Featuring a nylon insert for secure fastening, Stainless Steel 420 Nylon Insert Nuts come in sizes from M6 to M24. They offer stability and prevent loosening, ideal for applications where vibration resistance and durability are important.
Stainless Steel 420 Flange Hex Nuts provide enhanced load distribution with integrated flanges. Available in sizes from M6 to M24, they are used in heavy-duty machinery and structural applications where high hardness and support are needed.
Designed for high-stress applications, Stainless Steel 420 Heavy Hex Nuts are available in sizes from M6 to M36. They offer superior hardness and strength, making them suitable for use in industrial machinery and demanding environments.
Stainless Steel 420 Square Nuts offer a large surface area for effective torque application. Available in sizes from M6 to M24, they are ideal for secure fastening in tight spaces within various industrial and structural applications.
At Harsh Metalloys, we take great care in packaging our Stainless Steel 420 Nuts to ensure that they reach you in the best possible condition. Each set of nuts is securely wrapped in plastic and placed in sturdy wooden boxes, clearly labeled for easy identification and efficient delivery. We provide both domestic and international shipping options, using reliable courier services or air freight, depending on your location. All shipments come with full insurance, packing lists, commercial invoice, and all the information possible on the packages. Our utmost priority is your order arriving just as perfect, right on schedule, with extra packaging if possible and express service depending on need.
Stainless Steel 420 Nuts are widely used in machinery parts, automotive components, pump shafts, valves, surgical tools, and precision instruments. Their high hardness and good corrosion resistance make them suitable for applications in oil & gas, food processing, chemical equipment, and marine environments with moderate corrosion exposure. These nuts perform well in dry or mildly corrosive conditions where high wear resistance is required. Harsh Metalloys provides SS 420 nuts that meet stringent international standards, making them an ideal choice for fastening components in tough operating conditions that demand strength, security, and reliability.







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