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Standard steel washers add unnecessary weight, corrode in humid environments, and offer no visual differentiation between fastener zones — a real limitation in precision builds like RC models, bicycle frames, and mechanical assemblies where every gram counts and a clean, color-coded finish matters. These anodized aluminum flat washers are machined from high-strength aluminum alloy in M3, M4, and M5 metric sizes, available in 10 vibrant anodized colors and multiple outer diameter and thickness combinations to match your exact spacing and load distribution requirements.
Each washer is machined from high-strength aluminum alloy with an anodized surface treatment for excellent corrosion resistance, rust prevention, and a hard, color-fast finish. The flat washer profile distributes clamping load across a wider surface area, protecting the material surface and reducing the risk of fastener pull-through. Available in M3 (6mm OD, 0.5–3mm thick; 15mm OD, 2mm thick), M4 (10mm OD, 1.5mm thick), and M5 (12mm OD, 2mm thick) sizes, in 10 anodized colors: Royal Blue, Green, Golden, Dark Red, Black, Silver, Purple, Rose Red, Sky Blue, and Orange. Tolerance: ±0.3mm.
These aluminum flat washers are widely used in locomotive decoration, model modification, virtual space adjustment, RC model toy accessories, high-end aluminum alloy bicycle frames, mechanical equipment, mold processing, and general DIY precision builds where a lightweight, corrosion-resistant, color-matched washer is needed for load distribution, surface protection, or precise axial spacing.
Ideal for locomotive decoration, RC model modification, and aviation model toy accessories where lightweight, color-matched aluminum flat washers are needed for load distribution, surface protection, and precise axial spacing between components.
Used in high-end aluminum alloy bicycle frame assembly and sports equipment builds where lightweight, corrosion-resistant flat washers with a color-matched anodized finish are needed for both structural load distribution and a clean, professional appearance.
Suitable for mechanical equipment assembly, mold processing, and computer accessories where precise, lightweight M3/M4/M5 flat washers with consistent tolerances are required for surface protection, load distribution, and component spacing.
Perfect for any DIY precision build, custom enclosure, or fabrication project where a lightweight, anodized color-matched flat washer adds both structural function and a clean, professional aesthetic to the finished assembly.
| Material | Aluminum Alloy (Anodized) |
|---|---|
| Type | Flat Washer / Spacer / Gasket |
| Available Thread Sizes | M3, M4, M5 |
| M3 Sizes (ID x OD x Thickness) | M3 × 6mm × 0.5mm / 1mm / 1.5mm / 2mm / 2.5mm / 3mm; M3 × 15mm × 2mm |
| M4 Sizes (ID x OD x Thickness) | M4 × 10mm × 1.5mm |
| M5 Sizes (ID x OD x Thickness) | M5 × 12mm × 2mm |
| Available Colors | Royal Blue, Green, Golden, Dark Red, Black, Silver, Purple, Rose Red, Sky Blue, Orange (anodized) |
| Surface Treatment | Anodizing |
| Tolerance | ±0.3mm |
| Characteristics | High strength, good mechanical performance, easy to process, good wear resistance, corrosion resistant, non-magnetic |
| Typical Applications | Locomotive decoration, model modification, RC toys, bicycle frames, mechanical equipment, mold processing, DIY precision builds |
These washers are available in M3, M4, and M5 metric thread sizes with the following ID × OD × Thickness options: M3 × 6mm OD in 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, and 3mm thicknesses; M3 × 15mm OD in 2mm thickness; M4 × 10mm OD in 1.5mm thickness; and M5 × 12mm OD in 2mm thickness. Select your preferred size and color from the variant options above.
Both washers fit M3 metric screws (3mm inner diameter). The M3 × 6mm washer has a 6mm outer diameter — a standard compact washer for general load distribution and surface protection. The M3 × 15mm washer has a 15mm outer diameter — a larger washer that distributes clamping load across a wider area, useful in softer materials or applications where a larger bearing surface is needed to prevent pull-through.
Yes. Aluminum alloy is significantly lighter than steel — typically about one-third the weight for the same volume. These washers are also non-magnetic, making them suitable for applications where magnetic interference must be avoided.
Yes. The multiple thickness options available for M3 × 6mm OD (0.5mm through 3mm) make these washers well-suited for use as precision spacers or shims for axial spacing adjustment between components in model modification, mechanical assembly, and virtual space adjustment applications.
The anodized finish is integrated into the surface of the aluminum rather than applied as a paint or coating, making it generally more resistant to fading and chipping than painted alternatives under normal use conditions.
These aluminum flat washers are manufactured to a tolerance of ±0.3mm on inner diameter, outer diameter, and thickness dimensions, ensuring consistent fit across standard M3, M4, and M5 metric fasteners.
These washers are available in 10 anodized colors: Royal Blue, Green, Golden, Dark Red, Black, Silver, Purple, Rose Red, Sky Blue, and Orange. Select your preferred color from the variant options above.
