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Aexit 31.5mm Outer Washers Dia 16.3mm Inner Diameter 0.8mm Thickness Belleville Spring Belleville Washers Washer 15pcs: Industrial & Scientific. Buy Aexit 31.5mm Outer Washers Dia 16.3mm Inner Diameter 0.8mm Thickness Belleville Spring Belleville Washers Washer 15pcs: Belleville Washers - ✓ FREE DELIVERY possible on eligible purchases. Product Name: Belleville Spring; Package Content: 15pcs x Belleville Spring 。 Main Color: Copper Tone; Material: 60Si2MnA 。 Weight: 52g; Outer Diameter: 31.5mm / 1.24" 。 Inner Diameter: 16.3mm / 0.64''; Thickness: 0.8mm / 0.031'' 。 Standard: DIN2093 。 Surface Treatment: Add lubricating oil after phosphoric acid treatment.。Features: Belleville springs can also be called disc springs,are conically formed annular discs, which are loaded in the axial direction. It offers a well-developed solution to many engineering problems through a unique combination of high force in a small space.It can be used as a single disc or arranged in stacks. 。Application: Belleville springs are widely used in mechanical products, such as press machine, artillery, aircraft and other heavy machinery,it can also be used as compression springs for automobile and tractor. 。 。 。