Aluminum Flat Washers
Product Overview
Aluminum flat washers are stamped from 1100, 6061, and 7075 aluminum alloys, designed for load distribution and bearing surface protection in lightweight assemblies. Manufactured per DIN 125 and ISO 7089 standards, these washers provide corrosion resistance, conductivity, and weight savings compared to steel alternatives. Available in plain, anodized, and chromate conversion coated finishes. Dimensional tolerances follow DIN 125 and ISO 7089, with full material traceability available.
Key Features
- Lightweight construction for weight-sensitive applications.
- Corrosion resistance in atmospheric and mild chemical environments.
- Good electrical and thermal conductivity.
- Available in multiple alloy grades and finishes.
- Suitable for aerospace, electronics, and general industrial use.
| Attribute | Specification |
| Material alloys | 1100 (commercial purity), 6061 (structural), 7075 (high strength) |
| Diameter range (metric) | M2 – M36 (coarse and fine) |
| Diameter range (inch) | #2 – 1-1/2 inch (SAE/ASME) |
| Thickness range | 0.5 mm – 6 mm (depending on size) |
| Standards | DIN 125, ISO 7089, ASME B18.22.1 |
| Surface finishes | Plain, anodized (clear/color), chromate conversion, bright dip |
| Hardness (as-supplied) | 20 – 60 HRB (depending on alloy and temper) |
| Certification | EN 10204 3.1, dimensional inspection reports |
Aerospace
- Structural fastening
- Interior and exterior panels
- Engine and airframe components
Electronics
- PCB mounting and standoffs
- Heat sink attachment
- Enclosure and chassis assembly
General Industry
- Light machinery assembly
- Automotive lightweight components
- Consumer products and appliances
For general applications, 1100 aluminum provides good corrosion resistance and formability. 6061 offers higher strength and structural integrity. 7075 provides maximum strength for critical aerospace applications. When installing, avoid over-torquing as aluminum has lower hardness than steel. Use anti-seize compound to prevent galling when assembling with dissimilar materials. For electrical connections, ensure clean contact surfaces.
Frequently Asked Questions
Production & Customization
Chance & Union utilizes high-speed stamping and CNC machining processes to produce aluminum washers in both standard and custom dimensions. We offer material selection support, prototype development, and high-volume production with full quality control per ISO 9001. Dimensional verification, surface finish testing, and hardness inspection are available. Our engineering team can assist with design modifications for specific assembly and performance requirements.
Storage & Handling
- Store in a clean, dry area with relative humidity below 50% to prevent oxidation.
- Avoid contact with steel tools or acidic materials to prevent galvanic corrosion.
- Use plastic or coated containers; separate by size, alloy, and finish.
- Implement FIFO rotation; recommended shelf life up to 36 months in original packaging.
- Inspect for oxidation or mechanical damage before installation.
Leveraging the factory's robust R&D and production capabilities, we specialize in high-strength rivets bolts, nuts, washers, pins, screws, and various non-standard custom parts. As experienced Custom Aluminum Flat Washers Suppliers, we provide flexible manufacturing solutions for different customer requirements. Our product range covers materials including stainless steel, alloy steel, aluminum alloy, copper, and special alloys, utilizing processes such as cold heading, hot forging, and CNC machining. Our products are exported to over 25 countries, serving more than 200 clients.
Chance & Union is committed to seamlessly connecting "Manufactured in China" with the international market, providing global customers with one-stop fastening solutions from R&D to mass production through professional technology and exceptional quality.
