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Amin Fasteners, located in Safat, Kuwait, stands out as a top manufacturer and supplier, renowned for providing high-quality fastening solutions across various industrial sectors. Among its extensive product lineup, the Stainless Steel 321/321H Bolts are particularly prized for their remarkable heat resistance, durability, and structural reliability. Crafted with cutting-edge technology and rigorous quality standards, these bolts excel in high-temperature and corrosive settings. Amin Fasteners serves a range of industries, including petrochemical, aerospace, power generation, and oil & gas, delivering products that align with global specifications. With a strong commitment to excellence, the company remains a trusted provider of robust fastening components.
Stainless Steel 321/321H Bolts are a type of titanium-stabilized austenitic stainless steel, enriched with chromium and nickel, which grants them outstanding resistance to intergranular corrosion. The 321 grade is known for its excellent stability at high temperatures, while the 321H variant, with its higher carbon content, boosts high-temperature strength and creep resistance. These bolts showcase impressive tensile and yield strength, reliable oxidation resistance, and exceptional performance even at temperatures reaching 900°C. The addition of titanium helps prevent carbide precipitation during welding, ensuring the bolts maintain their structural integrity. Together, SS 321/321H deliver durable, heat-resistant fastening solutions for demanding industrial applications.
| 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 |
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 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Stainless Steel 321/321H Bolts find extensive use in industries that demand reliable performance under high temperatures and resistance to oxidation. They are perfect for aerospace systems, exhaust manifolds, furnace components, and thermal processing equipment. In the petrochemical and refinery sectors, these bolts are essential for pipelines, heat exchangers, and high-temperature reactors, ensuring safety and efficiency in critical operations. Their ability to withstand harsh conditions makes them a go-to choice for engineers and manufacturers looking for dependable fastening solutions in challenging environments.
Amin fasteners ensure uniqueness for all stainless steel 310/310S nuts through rigorous testing procedures before shipment. Our tests include hardness, Spectro analysis, PMI testing, flattening, fine and coarse testing, pitting resistance, flare, and intergranular corrosion (IGC) testing. We provide comprehensive documentation, including commercial invoices, packaging information, departure certificates and exit documents. To ensure absolute customer satisfaction, we also offer third-party inspection certificates, which prove our fruits’ high quality and reliability in various technical applications.
Amin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Safat, Kuwait, with over 8 years of experience serving global industries.
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