1.Springwashersare widely used in load-bearing and non-load-bearing structures of general mechanical products. They are characterized by convenient installation and suitable for the parts with frequent installation and disassembly. Spring washers in the screw industry, often called spring gaskets. Its material has stainless steel and carbon steel, carbon steel is iron usually with 65Mn spring steel or 70# carbon steel,3Cr13, can also be used in stainless steel materials 2. The spring washer is provided under the nut to prevent loosening. It is stated in the national standard. Hexagon slotted nut is specially used with the bolt with the hole at the end of the screw, in order to insert the opening pin into the hole of the screw from the groove of the nut, to prevent the nut from automatically loosening, mainly used for occasions with vibration load or alternating load.

Name	Spring washers
Model	M5-M50
Surface treatment	zinc
Material	Carbon steel, stainless steel
Standard	GB、DIN

Spring washers can prevent loose, increase the function of pre-tightening, and flat washers do not have this function, it can be used to increase the fastening contact area, prevent the friction between bolts and the workpiece, protect the surface of the connector to prevent bolts and nuts from scratching the surface of the workpiece when tightening. But some important connections, such as mainly rely on the compression of friction force transmission, is not able to use the spring pad, with the reduction of connection rigidity, anti accident prone. You can do without a spring washer. When the strength of the connecting piece is low, the flat pad or flange bolt is used to increase the contact area. When there are vibrations, pulses, and the temperature of the medium has relatively large fluctuations, the spring pad must be used.