There are many types of washers, and different types are used in different places and different functions, such as flat washers and spring washers.  So when to use the flat pad when to use the spring pad, the following fastener network craftsmanship good small to understand it.  

.  Spring gaskets are used to prevent loosening, and flat gaskets have no loosening function  

.  The flat washer just increases the contact area and if there is no spring washer, the nut will loosen  

.  Flat pad is only to increase the contact area, the spring pad can prevent loose, such as the motor and the bolt connected to the base of the general need to add spring pad, because the motor vibration if there is no spring pad, the nut will be loose  

Flat washers or flange bolts are used to increase the contact area when the strength of the connector is low  

.  Flat pads are designed to increase the contact area  

.  Spring pad can increase the preload  

.  The main function of flat washer and spring gasket is whether it is used for relaxation. If it is only to increase the contact area, flat washer should be selected.  At the same time, it mainly depends on the place where the friction force is transmitted  

.  The flat washer is used to protect the surface of the connector and prevent the surface of the workpiece from being scratched when the bolt and nut are tightened.  The spring pad is anti-loose  

.  PVC flange to add flat mat  

.  Use both together  

.  Flat washer is used to increase the contact area between the bolt and the fastener so that the force is uniform  

PVC flange is recommended to use flat gasket, if there is vibration can also be used together, flat gasket is placed near the flange  

.  Spring pads prevent loosening  

.  If there are elastic elements between the flanges, such as rubber pads, etc  

.  The anti-loosening of the spring pad is mainly to make a pretightening force always exist between the fasteners within the range of its elastic deformation. If it is only to prevent loosening, there are other pads such as the stop pad can be used.  

.  Flat gaskets only increase the contact area and spring gaskets are mainly used to pre-tighten and prevent loosening  

.  Compression artifacts