Aluminum Flat Washers, 16mm ID

If you need a washer sized for a specific fastener and opening, these aluminum flat washers offer clear dimensions and a 50-piece pack. If you prioritize a lightweight aluminum washer, the material may suit your project, if you prefer a washer with a stated load rating or a defined sealing specification, those details are not provided here.

The listed dimensions are a 16mm inner diameter, 22mm outer diameter, and 1.5mm thickness. That makes fit the first thing to check against your bolt and the surface being assembled—not just the general application listed for the product.

Where it shines

A flat washer can spread contact beneath a nut or bolt head and help keep the fastener from bearing directly on the assembled surface. These are aluminum, and the listing describes them as resistant to rust, moisture, and oxidation. Those are useful material claims for equipment or machinery exposed to damp conditions, but they do not establish how the washers will perform in a particular environment or under a particular load.

The product is presented for uses including pressure vessels, valves, cylinder heads, chemical equipment, and construction machinery. Treat that list as a range of intended applications, not proof that one washer is suitable for every connection in those systems. A practical fit check is to place the washer over the intended fastener and confirm that its opening and outside edge sit where the assembly requires them to.

What matters most

The measurements do most of the decision-making here: 16mm inside, 22mm outside, and 1.5mm thick. The inside diameter needs to accommodate the fastener, while the outside diameter determines how much surface the washer covers. Thickness can also affect how the assembled parts sit, so matching the dimensions of an existing washer is more dependable than choosing by application alone.

The pack contains 50 washers, which is useful when a job calls for several matching pieces or spares. The listing calls the finish plain, while the description also refers to a brushed surface, if appearance matters, that wording leaves some uncertainty about the exact finish. No load rating, hardness, or pressure specification is given, so these details should not be assumed for a critical joint. Worth considering if the dimensions and aluminum construction match a non-specialized fastening job. It’s not for you if your project requires documented pressure performance or a specific engineered sealing component.

Best use cases

These make the most sense when you already know the washer dimensions you need and want a batch of matching aluminum pieces. For example, during an equipment repair, you could compare one of these against the washer removed from a fitting, then use the remaining pack for other connections with the same requirements. The same approach works for general assembly where a flat washer is called for and the joint specification permits aluminum.

For a demanding application, a generic dimensional match is not enough: the product information does not identify a maximum load or define compatibility with a particular valve, cylinder head, or pressure vessel. In that situation, a washer selected to an engineering or equipment specification is the more appropriate route.

Is it worth it?

This 50-pack is a straightforward choice when the job calls for aluminum flat washers at exactly these dimensions. Its practical advantage is easy-to-check sizing in a multi-piece pack, with applications spanning general equipment and machinery work. The tradeoff is limited technical detail: there is no stated load rating, and the finish description is inconsistent. Choose it when the dimensions and material are the deciding factors, pass if your assembly needs certified performance, a specified seal, or finish certainty.