The anti loosing principle of the spring washer is that after the spring washer is pressed flat, the spring washer will produce a continuous elastic force, which makes the screw connection pair of the nut and the bolt maintain a continuous friction force and produce a resistance moment, so as to prevent the nut from loosening.
The spring washer is used for anti loosing. The flat washer has no anti loosing function. The flat washer only increases the contact area. The flat washer only increases the contact area. The spring washer can prevent loosing. For example, the bolt connecting the motor and the base usually needs a spring washer, because if the motor vibrates without a spring washer, the nut will loosen. Generally, the fastener on the equipment with vibration is equipped with a spring washer, Flange generally do not need to add gasket!
