
High-quality bolted connections often require at least qualitative washers - for correct load distribution. In the event that the fastened parts are permanently in vibration, the washers prevent the attachment from loosening. In some cases, the washers protect the surface from damage. Or - they serve for electrochemical isolation. The breadth of the puck functions also affected their diversity. Washers can be spring, and toothed, and even in the form of a wave.