Conical Spring Washers, also known as Belleville Washers, are specially designed disc-shaped washers with a slightly conical shape that provides a spring-like action. These washers are engineered to offer high load-bearing capacity and maintain tension in bolted assemblies, even under conditions involving thermal expansion, vibration, or loosening due to dynamic forces.

The conical shape allows them to compress under load, storing mechanical energy and maintaining a constant force between the bolt and the surface it secures. This makes them ideal for preloading fasteners and enhancing joint reliability in critical applications.

Conical spring washers are widely used in industries such as automotive, aerospace, electrical, and heavy machinery. They are available in a variety of materials including carbon steel, stainless steel (304, 316), alloy steels, and can be finished with zinc plating, black oxide, or phosphate coatings for enhanced corrosion resistance.

These washers comply with standards like DIN 2093, DIN 6796, and are offered in both metric and imperial sizes, tailored to suit various load and deflection requirements.