Based in Mumbai, India, Harsh Metalloys is a top producer and supplier of premium stainless steel 310S nuts, providing strong and effective fastening solutions for corrosive and extremely hot or cold environments. To satisfy strict international standards, our SS 310S nuts are made with premium-grade raw materials and precise engineering methods. These nuts are well-known for their remarkable mechanical strength, oxidation resistance, and heat resistance, making them appropriate for demanding industrial applications. Harsh Metalloys has established a solid reputation as a dependable supplier of stainless steel fasteners in both domestic and foreign markets thanks to its strong dedication to quality, on-time delivery, and customer satisfaction.
In order to improve weldability and decrease carbide precipitation, stainless steel 310S nuts have a low carbon content (≤0.08%), iron, 24–26% chromium, and 19–22% nickel. These nuts are perfect for high-heat applications because of their exceptional resistance to oxidation at temperatures as high as 1100°C. Tensile strength of roughly 515 MPa, yield strength of 205 MPa, and elongation of about 40% are among the mechanical characteristics. Under corrosive exposure and heat stress, SS 310S nuts retain their strength and durability, providing long-term performance in challenging operating environments.
| Specifications | ASTM F593, F594, F1554 / ASME SF593, F594, F1554 |
|---|---|
| Fasteners size | Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Washers Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes Machine Screws Size : M1.6 – M12 Self Tapping Screw Size : No.2 – No. 14 |
| Fasteners Length | 3 mm to 200 mm |
| Fastener Threads | UNF, BSW, BSF, METRIC, UNC or as required |
| Standard of Stainless Steel Fasteners | DIN : DIN 934, DIN 931, DIN 970, DIN 933 UTS : UNEF, NPT, UNC, UNS, UNF, NPTF ISO : JIS standards, ISO 4033, ISO 4032, ANSI – American National Standards Institute ASME B18.5 ANSI B 28.2.4 1M as per defined in ASME B16.5 standard SS Stud Bolt length ANSI B 18.2.4 2M as per defined in ASME B18.2.2 SS Hex nuts |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Surface Coating | Ptfe Coated Stainless Steel Fasteners Phosphate Coating Teflon Coating Zinc Coating Hot Dipped Galvanizing Coating Cadmium Coating Xylon Coating |
| Fasteners Finishing | Stainless steel : Self-Colour, Passivated, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), Stainless Steel, Sherardized, some special one like DACROMET Geometry and Mechanically Applied coating ,Dacroment, nickel plated, anodizing, plated zinc-nickel Zinc (blue, black, yellow, white), black oxide. |
|
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
|
SS 310S |
0.08 max |
2.0 max |
1.00 max |
0.045 max |
0.030 max |
24.00 – 26.00 |
0.75 max |
19.00 – 21.00 |
53.095 min |
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Corrosion-resistant product ideal for high-temperature environments. Stainless Steel 310S Nuts are available in sizes from M6 to M36, suitable for furnace parts, heat exchangers, and chemical processing equipment where durability and heat resistance are crucial.
Stainless Steel 310S Coupling Nuts are designed for joining threaded rods in extreme conditions. Sizes range from M6 to M36, making them ideal for high-heat and corrosive applications such as in chemical processing and power generation.
Featuring a nylon insert for secure fastening, Stainless Steel 310S Nylon Insert Nuts are available in sizes from M6 to M24. They provide stability and resist high temperatures, making them suitable for use in industrial machinery and heat exchangers.
Stainless Steel 310S Flange Hex Nuts offer enhanced load distribution with integrated flanges. Available in sizes from M6 to M24, they are used in high-temperature applications such as furnace construction and chemical processing where strong support is needed.
Engineered for high-stress and high-temperature environments, Stainless Steel 310S Heavy Hex Nuts are available in sizes from M6 to M36. They are ideal for use in applications like heat exchangers and industrial machinery, offering exceptional strength and durability.
Stainless Steel 310S Square Nuts provide a large surface area for effective torque application. Sizes range from M6 to M24, making them suitable for high-temperature applications where secure fastening and heat resistance are essential.
In industries where parts are subjected to high temperatures and corrosive conditions, stainless steel 310S nuts are frequently utilised. Common uses include boilers, incinerators, thermal oxidisers, heat treatment apparatus, and furnace construction. In the chemical processing, petrochemical, and power generation sectors, where resistance to high temperatures is critical, these nuts are also vital. Because of their longevity and oxidation resistance, SS 310S nuts are used in heat exchangers, exhaust systems and flue gas cleaning systems. Their superior mechanical and thermal properties ensure secure and long-lasting fastening in applications demanding both structural integrity and resistance to elevated temperatures.







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