Washers are flat, thin, circular discs used as sealing gaskets or spacers in various applications. They are often used to prevent leakage of liquids or gases from pipes, fittings, and other components.
Copper washers, in particular, have several advantages, such as the fact that they are corrosion-resistant, making them an ideal choice for applications where exposure to moisture and other corrosive elements is a concern. They also have high compressibility and malleability, making them excellent sealing materials for high-pressure applications.