Belleville Conical Washers 18-8 Stainless Steel

Conical Belleville Washers

18-8 Stainless Steel Disc Spring 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.


Outer Diameter Thickness Height
#6 .312 .016 .032
#8 .375 .025 .048
#10 .437 .025 .048
1/4" .500 .030 .062
5/16" .625 .040 .078
3/8" .750 .050 .100
1/2" 1.00 .062 .125
5/8" 1.25 .078 .156
3/4" 1.50 .078 .156
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