Spring washers are disks of metal that form an irregular shape, so that when the washer is loaded it acts like a spring and deflects, providing a pre load between the two surfaces.
Spring washers are primarily used in applications where manufacturing assemblies need a part to:
Take up play
Eliminate rattle
Maintain assembly tension
Compensate for expansion or contraction in materials after assembly
Absorb intermittent shock loads
Provide a controlled reaction under dynamic...