Spring washers are available with a single or a double coil. These are placed under a nut in the assembly as washers. The stiff resistance offered by the washer against the surface of the nuts serves to prevent loosening.

Tab washers can be used for locking the nuts which are located near an edge or corner.

Washers are used to distribute the clamping pressure over a larger area, and prevent the surface damaged (marking). They are also provide an increased bearing surface for bolt heads and nuts. Washers are manufactured in light, medium, heavy and extra heavy series.