Washer kits comprise a variety of different disc-shaped plates with holes. They are typically used to distribute the load of a particular type of threaded fastener, like a screw or bolt.
Washers have two main purposes:
This type of washer prevents damage to a surface when it is being fixed. Alternatively, it can act as electrical insulation.
Spring washers have axial (forming an axis) flexibility and are typically used to prevent fastening or loosening caused by vibration.
Locking washer kits prevent the unscrewing of the fastening device for improved durability.