| Customization: | Available |
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| Type: | Metal Washers |
| Material: | Stainless Steel |
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| Union Stainless Steel Metal Washers |
| Name |
| Metal Washers |
| Material |
| Stainless Steel, Carbon Steel, etc |
| size |
| 2.2x5 to 10.5X20 or non-standard as request&design |
| Surface Treatment |
| Plain, Passivation, Polishing, Zinc plated/ Coated, Customized |
| OEM |
| Made in China |
| Lead Time |
| Based on quantity |
| Stainless Steel Chemical Composition | |||||||||
| Grade | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Ni | Cr | Mo | Other |
| 201 | 0.15 | 1.00 | 5.5-7.5 | 0.060 | 0.03 | 3.5-5.5 | 16-18 | N≤0.25 | |
| 304 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-10.0 | 18-20 | ||
| 304L | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-12.0 | 18-20 | ||
| 321 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-13.0 | 17-19 | Ti≤5*C% | |
| 316 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 10.0-14.0 | 16-18 | 2-3 | |
| 316L | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 10.0-15.0 | 16-18 | 2-3 | |
| 309S | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 12.0-15.0 | 22-24 | ||
| 410 | 0.15 | 1.00 | 0.03 | - | 11.5-13.5 | ||||
| 420 | 0.26-0.4 | 1.00 | 0.03 | - | 12-14 | ||||
| 430 | 0.12 | 0.75 | 1.00 | 0.040 | 0.03 | - | 16-18 | ||
| Main Fastener Coating | |||
| Types | Application | Spray Test Hours | Characteristics |
| Zinc, Electroplated | All Metal | 96Hours | Lower cost and bright surface |
| Hot Dip Galvanized | All Metal | 96Hours | Low corrosion rate and resists mechanical damage. |
| Electro Nickel | All Metal | 200Hours | Flexibility in plating volume and thickness |
| Mechanical Plating | Steel | 1000Hours | Smooth finish with high anti-corrosion grade |
| Black Oxide | All Metal | 3-5Hours | Cheap |
| Dacrotized | Steel | 1000Hours | Pollution-free ceramic coating |
| Passivation | Stainless Steel | / | Dissolved iron contaminants |
| Wax | Stainless Steel & Plated Fasteners | Fair, used as a lubricate | Used for ease of assembly |
Screw washers are disc-shaped pieces used with screws and bolts to distribute load, reduce friction, and protect surfaces.
Common types:
Metal - Basic steel, aluminum, or brass washers. An inexpensive, smooth surface prevents damage and sticking. Sizes from 1/4 to several inches.
EPDM - Synthetic rubber washers. Flexible, cushion vibrations, conform to uneven surfaces. Resist weathering and corrosion. Used where vibration is a concern.
Bonded Metal-EPDM - Metal washer laminated with EPDM rubber. Combines strength with vibration dampening. Used on equipment with high vibration like exhaust systems.
Roofing - Metal-EPDM washers are commonly used with roofing screws for waterproof, durable seals.
Choosing the right washer type is key for optimal fastener performance. Each offers specific advantages depending on the application. Overall, washers strengthen connections and extend service life.
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