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Lina Fasteners stands out as a top manufacturer and supplier located in Tunis, Tunisia, focusing on high-quality Stainless Steel 321 and 321H Bolts designed for tough industrial and high-temperature environments. With state-of-the-art production facilities and rigorous quality control measures, the company guarantees that its bolts adhere to international standards and meet specific customer needs. Lina Fasteners caters to various sectors, including aerospace, petrochemical, power generation, chemical processing, and marine engineering. Renowned for their exceptional resistance to oxidation, corrosion, and intergranular attack at high temperatures, these Stainless Steel 321/321H Bolts ensure reliable fastening in critical applications. The company’s dedication to precision, durability, and timely delivery has earned it a reputation as a trusted global supplier.
Stainless Steel 321 and 321H Bolts are crafted from an austenitic stainless steel alloy that includes chromium, nickel, and titanium. The addition of titanium helps prevent intergranular corrosion when exposed to high temperatures. With a higher carbon content, 321H offers enhanced creep resistance. These bolts boast impressive tensile and yield strength, outstanding toughness, and good dimensional stability under thermal stress. They resist oxidation and maintain their structural integrity even at elevated temperatures, making them perfect for bolted assemblies that require long-lasting performance, high-temperature reliability, and resistance to corrosion and thermal fatigue.
| Specifications | : | ASTM A 193 ASME SA 193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts, Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 347 | min. | – | – | – | – | – | 17.0 | 2.00 | 9.0 | – |
| max. | 0.08 | 2.0 | 1.00 | 0.045 | 0.030 | 20.0 | 3.00 | 13.0 | – | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347 | 515 | 205 | 40 | 95 | 201 |
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 are used in applications requiring high thermal resistance and strong corrosion protection. They are ideal for aerospace, automotive exhaust systems and high-temperature gasoline engines. These bolts are also used in medicine because of their resistance to sulfuric and phosphoric acids. Their durable characteristics ensure reliable performance in high-pressure environments, making them suitable for a wide range of industrial applications where strength and durability are important
Stainless Steel 321 and 321H Bolts find extensive use in industries where high-temperature performance and corrosion resistance are crucial. Common applications include boilers, heat exchangers, chemical processing equipment, petrochemical plants, power generation units, and aerospace components. They are particularly well-suited for flanged connections, pressure vessels, and piping systems, ensuring safety and reliability in demanding environments.
Lina Fasteners is a leading manufacturer and supplier of high-quality fasteners in Tunis, Tunisia, with over 8 years of experience serving global industries.
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