Based in Mumbai, India, Harsh Metalloys is a reputable producer and supplier of premium stainless steel 310 nuts that are renowned for their exceptional performance in corrosive and high-temperature conditions. To guarantee strength, dependability, and durability, these nuts are made with premium-grade raw materials and cutting-edge manufacturing processes. Harsh Metalloys offers SS 310 Nuts that are perfect for demanding industrial applications and is dedicated to meeting international quality standards. Across international markets, our products provide exceptional resistance to oxidation and thermal stress, along with prompt delivery and customer-focused service, to a range of industries, including petrochemical, power generation, and heat treatment.
The 24–26% chromium and 19–22% nickel content of stainless steel 310 nuts provides exceptional resistance to oxidation and high temperatures. Up to 1100°C, these nuts retain their integrity, giving them exceptional strength and durability. Their mechanical characteristics include an approximate elongation of 40%, a yield strength of 205 MPa, and a tensile strength of 515 MPa. Because of their exceptional toughness and thermal stability, SS 310 nuts are ideal for fastening and structural applications in industrial environments that are subjected to high temperatures and corrosive 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 310 | 0.015 max | 2.0 max | 0.15 max | 0.020 max | 0.015 max | 24.00 – 26.00 | 0.10 max | 19.00 – 21.00 | 54.7 min |
| Element | SS 310 |
| Tensile Strength (MPa) min | 515 |
| Yield Strength 0.2% Proof (MPa) min | 205 |
| Elongation (% in 50mm) min | 40 |
| Rockwell B (HR B) max Hardness | 95 |
| Brinell (HB) max Hardness | 217 |
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A corrosion-resistant product, Stainless Steel 310 nuts are available in sizes from M6 to M64. They are designed for high-temperature applications, providing excellent resistance to oxidation and durability in extreme heat environments.
A corrosion-resistant product, Stainless Steel 310 coupling nuts, available in sizes from M6 to M36, connect two male threads securely. Their high-temperature resistance makes them ideal for use in furnace and heat exchanger applications.
A corrosion-resistant product, Stainless Steel 310 nylon insert nuts, or lock nuts, come in sizes from M3 to M36. The nylon insert prevents loosening under vibration, and the stainless steel provides heat and oxidation resistance for high-temperature environments.
A corrosion-resistant product, Stainless Steel 310 flange hex nuts feature an integrated flange and are available in sizes from M5 to M20. They offer superior load distribution and stability in high-temperature applications, such as in industrial furnaces.
A corrosion-resistant product, Stainless Steel 310 heavy hex nuts are available in sizes from M10 to M48. Their increased thickness provides superior strength and durability, ideal for heavy-duty applications in extreme heat conditions.
A corrosion-resistant product, Stainless Steel 310 square nuts come in sizes from M6 to M30. Their larger contact surface ensures secure fastening, making them suitable for high-temperature applications in industrial and aerospace settings.
Applications where resistance to heat and oxidation is crucial frequently use stainless steel 310 nuts. They are perfect for use in boilers, heat exchangers, furnaces, and other high-temperature processing machinery found in refineries, petrochemical plants, and power plants. Because of their capacity to retain mechanical strength under thermal cycling, these nuts are also utilised in incinerators, flue gas systems, and thermal processing units. In high-temperature and corrosive environments, SS 310 Nuts offer safe fastening solutions for reactor assemblies, piping systems, and structural supports, guaranteeing stability, safety, and long-term performance in demanding industrial operations.







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