Dished Washer

A dished washer is a conical disc that flexes under load to keep tension in a joint. It is used where a spring action is needed in a small space.

A dished washer is used to provide spring tension in a bolted joint. It often sits under a nut or bolt head to compensate for slight movement or thermal expansion. It can be stacked to adjust the load and deflection.

Dished washers are often made in stainless steel 304 for general corrosion resistance. They can also be made in carbon steel for higher load applications.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance for the material and any heat treatment. On receipt, check the conical shape is uniform and the washer is free from cracks or flat spots.