The price is in the supply chain, not the plastic
A washer is cheap to mold. Supplying one for military use can be a different business: the buyer may require it to come from a vendor that has been reviewed and approved for the work. That narrows the pool of suppliers able to compete, even when many factories could physically make the part.
Approval can carry costs beyond the washer itself. A supplier may need to show that its process is controlled, keep records linking parts to their production, and meet requirements for inspection and documentation. Those obligations take staff time and systems to maintain. They can make a small order expensive even when the part requires little material or labor.
Small orders make fixed costs loom large
Much of the expense is tied to setting up and sustaining a compliant source, rather than molding each individual washer. If only a limited number of parts are ordered, those costs are spread across fewer units. The quoted price can therefore look astonishing beside the cost of an ordinary retail washer—without implying that the plastic itself is valuable.
The tradeoff is access and assurance: the buyer is paying for a part delivered through an accepted, documented supply route, not merely for a shape that fits. That distinction is why a simple washer can carry a five-figure price in a specialized procurement system.
