The 1421E25W is a package of 25 metal cup washers. These washers feature a durable steel construction with a nickel-plated finish and an outside diameter of 0.60 inches. They are specifically designed for use with 10-32 countersunk screws. This hardware provides a clean, finished appearance for screw heads while distributing the fastener's load, making it ideal for securing panels and components in electronic enclosures and assemblies.