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Lina Fasteners is a well-respected manufacturer and supplier located in Tunis, Tunisia, that specializes in top-notch Stainless Steel 321 and 321H Washers designed for tough industrial and high-temperature environments. With state-of-the-art manufacturing facilities and rigorous quality control measures, the company guarantees that its washers comply with international standards and meet specific customer needs. Lina Fasteners caters to various sectors, including petrochemical, power generation, chemical processing, marine, and heavy engineering. Renowned for their outstanding resistance to corrosion, oxidation, and intergranular attack at high temperatures, the Stainless Steel 321/321H Washers ensure reliable load distribution and joint integrity. The company’s commitment to quality, precision, and timely delivery has made it a trusted supplier on a global scale.
Stainless Steel 321 and 321H Washers are crafted from an austenitic stainless steel alloy that includes chromium, nickel, and titanium. The addition of titanium helps prevent carbide precipitation, providing excellent resistance to intergranular corrosion, especially during high-temperature operations. The 321H grade features a higher carbon content, which enhances its creep and tensile strength at elevated temperatures. These washers are known for their good tensile strength, impressive toughness, and stability under thermal and mechanical stress. Their ability to resist oxidation and thermal fatigue makes them perfect for long-term use in high-temperature and corrosive settings.
| 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 | Wedge Lock Washers, Square Washer, Spring Lock Washer, Self Locking Washer, Sealing Washer, Plain Flat Washer, Ogee Washer, Industrial Washer, Hex Washer, Finishing Washer, Fender Washer, Conical Washer, Countersunk Washer, Square Beveled Washer, Curved Wave Washer, External Tooth Lock Washer, Internal Tooth Lock Washers, Internal Tab Washers, lock washer Fastener, Wedge Lock Washers, Tab Washer, Structural Washers. |
| Grade | AISI | Stainless Steel Bolts Chemical Composition (% maxima unless stated) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu | ||||||
| A1 | SS 202 | 0.12 | 1.0 | 6.5 | 0.20 | 0.15-0.35 | 16,0 – 19,0 | 0.7 | 5,0 – 10,0 | 1.75-2.25 | ||||
| A2 | SS 304 | 0.08 | 1.0 | 2.0 | 0.05 | 0.03 | 15,0 – 20,0 | 0.0 | 8,0 – 19,0 | 4.0 | ||||
| A3 | SS 321 | 0.08 | 1.0 | 2.0 | 0.05 | 0.03 | 17,0 – 19,0 | 0.0 | 9,0 – 12,0 | 1.0 | ||||
| A4 | SS 316 | 0.08 | 1.0 | 2.0 | 0.05 | 0.03 | 16,0 – 18,5 | 2,0 – 3,0 | 10,0 – 15,0 | 4.0 | ||||
| C1 | SS 410 | 0.09-0.15 | 1.0 | 1.0 | 0.05 | 0.03 | 11,5 – 14,0 | – | 1 | – | ||||
| C3 | SS 431 | 0.17-0.25 | 1.0 | 1.0 | 0.04 | 0.03 | 16,0 – 18,0 | – | 1,5 – 2,5 | – | ||||
| C4 | SS 416 | 0.08-0.15 | 1.0 | 1.5 | 0.06 | 0.15-0.35 | 12,0 – 14,0 | 0.6 | 1 | – | ||||
| F1 | SS 430 | 0.12 | 1.0 | 1.0 | 0.04 | 0.03 | 15,0 – 18,0 | 0.0 | 1 | – | ||||
| Stainless Steel Bolts | Class | Tensile Stress Rm MPa (N/mm2) minimum | Yield Strength Rp 0.2 Mpa (N/mm2) minimum | AL Minimum Elongation | Diameter |
|---|---|---|---|---|---|
| Stainless Steel Bolts | 70 | 700 | 450 | 0.4d | =<M20 |
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 and 321H Washers find extensive use in industries that demand reliable performance in high-temperature and corrosive environments. They are commonly utilized in boilers, heat exchangers, chemical processing equipment, petrochemical facilities, power generation units, and marine applications. These washers are particularly well-suited for flanged joints, piping systems, and other critical applications where durability and performance are essential.
At Lina Fasteners, we prioritize the safety and quality of our Stainless Steel 321/321H washers when fastening them. Each washer is thoroughly inspected and wrapped in protective packaging to prevent any damage. They are then placed in clearly labeled sturdy boxes with detailed product specifications and quantities. Our packaging is designed to protect the environment and physical impact, ensuring that your high-performance washer arrives in perfect condition and ready for immediate use quite.
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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