Washers - Bushing, ShoulderWashers are flat, circular disks that are used in conjunction with screws, bolts, and other fasteners to distribute the load of a tightened fastener evenly over a wider area. This helps to prevent damage to the material being fastened, and can also help to prevent the fastener from loosening over time. Shoulder bushings are a type of washer that have a shoulder or step on one side, which provides a stop or bearing surface for the fastener. These bushings are typically used to provide support for a fastener, or to provide a precise spacing between two components. They are available in a variety of different sizes and materials to suit different applications and design requirements.