Why use a washer?
Why use a washer?
① If the base material is very soft, the surface of the base mother board material will be damaged during the screwing in of the bolts or screws. By using a washer, this squeezing force can be distributed over a larger area to avoid damage to the surface of the motherboard.
② If the base material is very soft and the periphery of the hole where the fastener is installed has been damaged, then the problem of pull-through failure may occur during the screwing of the fastener, because in most cases, the application The force during the tightening process is sufficient to pull the fastener through the material mother board, and the presence of the washer helps to generate less build-up pressure.
③ When the surface of the mother board into which the bolt or screw is screwed is not smooth and flat, the head of the fastener is likely to be stuck. By using a washer, the surface of the bolt or screw can be ensured to slide and the installation becomes simpler.
④ 、 Some washers adopt special structural design to make them have the function of preventing the nuts from loosening. We commonly refer to this type of washer as a lock washer. There are many types of structures, such as open type, star type and wave type. This type of lock washer needs to be used with a nut.
