Amer Stainless, located in Amman, Jordan, has built a solid reputation as a reliable manufacturer and supplier of top-notch Stainless Steel 321 / 321H Fasteners. These fasteners are designed to provide durable and dependable solutions for industries that operate in high-temperature and corrosive environments. Thanks to their advanced manufacturing techniques, precision engineering, and rigorous quality control, Amer Stainless guarantees that each fastener meets international standards for performance and longevity. They focus on creating fasteners that can maintain their structural integrity even in the toughest conditions. Their 321 / 321H Fasteners are popular in sectors like petrochemical, power generation, thermal processing, and various industrial applications, making them a trusted partner for critical fastening needs.
Stainless Steel 321 / 321H Fasteners are austenitic alloys that contain around 17–19% chromium, 9–12% nickel, and titanium to help prevent carbide precipitation. The 321H version has a higher carbon content, which enhances its creep and tensile strength at elevated temperatures. These fasteners boast impressive tensile and yield strength, along with high ductility and reliable toughness. They maintain their shape even under prolonged heat exposure and resist oxidation, scaling, and intergranular corrosion. These characteristics make 321 / 321H fasteners ideal for high-temperature applications where strength, durability, and resistance to thermal and chemical stress are essential.
Specification : ASTM F593, F594, F1554 / ASME SF593, F594, F1554
Standard : DIN, ASTM, BS and all International Standards
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
Length : 3 mm to 200 mm
Types : Nuts, Bolts, Screws, Stud Bolts, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Spring Washers, Studs, Anchors, Marine Anchors, Nut, Hexagon Nut, Hex Nut, Hex Coupling Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Hex Head Bolts, Socket Hexagon Head Screw Anchor Bolt, U- Bolts, J Bolts, Mushroom Head Square Neck Bolts, T-Head Bolts, Wing Screw, Eye Bolt, Foundation Bolts, Structural Bolts.
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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Stainless Steel 321 Nuts offer excellent resistance to oxidation and corrosion, particularly in high-temperature environments. They are typically available sizes from M6 to M36, with various thread standards. They are commonly used in aerospace and industrial applications where high temperatures are prevalent.
Stainless Steel 321H Stud Bolts provide outstanding oxidation and chemical corrosion resistance, especially in high-temperature conditions. They usually come in lengths from 50 mm to 300 mm and diameters from M8 to M30. Ideal for high-stress environments in chemical processing and aerospace industries.
Stainless Steel 321H Bolts offer high resistance to corrosion and oxidation in elevated temperatures. They are available in sizes ranging from M6 to M36, tailored to specific length requirements, and are widely used in structural and high-temperature applications.
Stainless Steel 321 and 321H threaded rods are designed to resist corrosion and oxidation in harsh environments. They typically come in lengths from 100 mm to 1000 mm and diameters from M6 to M30. Suitable for structural and high-temperature applications.
Stainless Steel 321 screws provide excellent resistance to rust and oxidation, especially at elevated temperatures. They are available in various sizes from M2 to M20 and are often used in applications where resistance to heat and corrosion is critical.
Stainless Steel 321H washers offer strong resistance to corrosion and high temperatures. They come in sizes that match common bolt and nut dimensions, typically from M6 to M36. It is ideal for use in high-temperature applications and aggressive environments.
We pay immense attention at the time of packing of these Stainless Steel 321/321H Fasteners to ensure these are delivered in good condition at the doorstep of our customers. We use high-quality packing materials that meet the industry standards, such as strong wooden boxes, durable pallets, and eco-friendly packaging options. This careful packing prevents dirt, dust, or contaminants from affecting the fasteners, thus preserving their superior quality. Moreover, our robust packaging safeguards the products during transit, minimizing the risk of damage or contamination. Detail attentiveness and the commitment to quality assurance reflect a commitment to offering the best quality products to the valued customers.
Stainless Steel 321 / 321H Fasteners are extensively used in industries that need dependable fastening solutions that can withstand high temperatures. They’re commonly found in petrochemical plants, where they secure heat exchangers, reactors, and piping systems that face thermal stress. Power generation facilities rely on these fasteners for boilers, turbines, and superheater assemblies because of their excellent creep resistance. Additionally, this alloy is utilized in the construction of furnaces, kilns, and other high-temperature environments, ensuring that they can handle the demands of various industrial applications.
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