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Rinku Fasteners is a reputable manufacturer and supplier of top-notch Stainless Steel 321/321H Washers, proudly based in Kolkata, India. The company has built a solid reputation for providing precision-engineered fastening solutions that can handle high temperatures and tough industrial conditions. Their SS 321/321H washers are known for their excellent corrosion resistance, outstanding thermal stability, and reliable mechanical strength, making them ideal for high-pressure and high-temperature applications. With cutting-edge manufacturing technology, rigorous quality control, and a commitment to international standards, Rinku Fasteners guarantees consistent product performance. Their focus on quality, reliability, and customer satisfaction has established them as a key player in both domestic and global fastener markets.
Stainless Steel 321/321H Washers are crafted from titanium-stabilized austenitic stainless steel, rich in chromium and nickel. Grade 321 is particularly effective against intergranular corrosion, while 321H, with its higher carbon content, offers improved strength at elevated temperatures. These washers boast impressive mechanical properties, including high tensile strength, good creep resistance, and exceptional stability when exposed to heat. They maintain their structural integrity even under thermal cycling and oxidative conditions. The combination of thermal durability, corrosion resistance, and mechanical reliability makes SS 321/321H washers perfect for demanding, high-temperature industrial 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 321/321H Washers find extensive use in industries that demand outstanding heat resistance and long-lasting stability in high-temperature environments. They’re commonly found in refinery equipment, chemical processing units, furnace components, and high-temperature piping systems. Additionally, these washers are utilized in aerospace components, exhaust manifolds, expansion joints, and thermal processing applications.
At Rinku 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.
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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