A Washer is an important component in the Rotating Pump of a piston pump that is used between the spring and retainer. A washer is a spherical piece of metal or plastic with a hole in the center that is used to distribute the load of a fastener, such as a bolt or a screw. A Washer can also be used as a spacer to adjust the distance between two objects or surfaces.Attributes:• Provide a larger surface area to spread the load and prevent damage to the surface.• Minimizes the amount of wear and tear and prevents damage to the components• Protect against damage, the load is evenly distributed and the tension on the fastener is reducedApplications:A Washer is used to fill the gap between the Piston Plate and Barrel Assembly in the piston pump.