35mm Outer Dia 15mm Inner Dia 3.5mm Thickness Belleville Spring Washer 5pcs

Surface : Add?lubricating oil after?phosphoric acid . 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.