Doyon 30222300000901

STOP THE WASHER

A stop is a part designed to restrict the movement of a rotary mechanism, linear (sliding) mechanism or its components. It protects a mechanism from loss of adjustment or damage due to extreme movement. A stop or stopper may also be designed to calibrate and halt the flow of solids, liquids or gases.

A washer is a thin plate (typically disk-shaped, but sometimes square) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut. Other uses are as a spacer, spring (Belleville washer, wave washer), wear pad, preload indicating device, locking device, and to reduce vibration (rubber washer). Spring washers, which have axial flexibility are used to prevent fastening or loosening due to vibrations. Locking (lock) washers prevent fastening or loosening by preventing unscrewing rotation of the fastening device.