Spring washers: nbr gasket locking effect in general, important parts as little as possible with or without, while the use of self-locking structure. For tightening for high-speed (pneumatic or electric) spring washer, preferably using surface phosphating gaskets to improve its wear properties, or easy to friction heat and burn or mouth, or even damage the surface of the connected parts. For thin junction, spring washers structure should not be used. According to statistics, spring washers used in the car have become less and less.

2 toothed washer: toothed washer flat washer in the name suggests is a plurality of teeth on the mouth, usually connected toothed washer locking force as large and uniform, in the automotive industry to use more, and interval shape is relatively use less.

Through the above brief introduction, we can see the washer in the car's role is very huge and important.