Aluminum Flat Washers
What are aluminum flat washers? Aluminum flat washers are general-purpose round washers made from lightweight aluminum alloy that spread a fastener's load and protect the surface. At about a third the weight of steel, they are non-magnetic and corrosion resistant, suited to weight-critical, electrical, and decorative work.
When to use aluminum flat washers
Aluminum washers are chosen where weight, appearance, or non-magnetic properties matter more than raw strength. At roughly one-third the weight of steel, they suit aerospace, automotive, drone, and RC builds, and their bright, silvery finish and ability to anodize make them popular for decorative and color-matched hardware. Aluminum is also naturally corrosion resistant and non-magnetic. Because it is softer than steel, use aluminum for light to moderate loads, and pair it with aluminum or matching hardware to limit galvanic corrosion in wet use.
Why choose aluminum flat washers
- Lightweight: about one-third the weight of steel.
- Non-magnetic: for electronics and sensitive assemblies.
- Corrosion resistant: naturally resists rust and anodizes well.
- Decorative: bright finish that can be color anodized.
Common applications for aluminum flat washers
- Aerospace, drone, and RC builds
- Automotive and motorsport weight savings
- Electronics and non-magnetic hardware
- Decorative and anodized-match assemblies
For maximum strength or corrosion resistance, see stainless flat washers, and browse every material on the main flat washers category.
Aluminum Flat Washers FAQ
Are aluminum washers strong enough for structural use?
No. Aluminum is softer than steel and suits light to moderate loads. For structural strength, choose steel or stainless washers.
Are aluminum washers magnetic?
No. Aluminum is non-magnetic, which makes these washers a good choice for electronics and instrument work.
Can aluminum washers be anodized a color?
Yes. Aluminum anodizes well, so these washers are often used where color-matched or decorative hardware is wanted.