Conical Belleville Washers

• Also referred to as Belleville Washers, Disc Springs, Spring Washers, Conical Washers, Cupped Spring Washers, or Conical Spring Washers
• Used to apply a flexible pre-load to a bolted joint or bearing
• Corrosion resistant 18-8 stainless steel
• Can be used in a stack below the bolt head to apply a greater pre-load
• Variety of uses including vibration reduction and pressure indicators
• Commonly used in automotive applications, aerospace, firearms and general machinery

Conical Belleville washers are used primarily to add pre-load to a nut and bolt assembly. When placed under the head of the bolt, they add a layer of force between the bolt head and the installation surface. This serves as a resistance to vibration to prevent accidental loosening, which is why these washers are commonly found on automobiles, airplanes, and heavy machinery.