Cup

Cup washers are a type of flat washer distinguished by their concave, cup-shaped design, which allows them to neatly seat and support the head of a fastener. Commonly used in mechanical assemblies, they provide a clean, professional finish while distributing the load of screws or nuts over a wider surface area. This helps prevent damage to the material beneath and improves the overall stability of the connection. Cup washers are particularly suited for use with countersunk screws, enhancing both appearance and performance in a wide range of applications.