Belleville Washer

A Belleville washer is a dished disc that acts as a spring when compressed. It applies a controlled load over a small area and is used where space is tight.

A Belleville washer is used to apply a controlled axial load in bolted joints. It often sits under a nut or bolt head to maintain tension where vibration or thermal cycling occurs. It can be stacked in series or parallel to alter deflection and load characteristics.

Belleville washers are often made in spring steel for high load use. They can also be made in stainless steel grades such as 304 or 316 for corrosion resistance.

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

Ask for a mill test certificate or a certificate of conformance for the material and heat treatment. On receipt, check the dish height and that the washer sits flat without cracks.