Spring washer are mainly punched out from iron plates. Spring washer: after lock, use elastic pad have the effect of locking, and of course to a double nut effect is poor.
Single nut + flat mat, play mat: rely on the nut itself locking force and elastic cushion locking performance, a double nut.
Flat washer: only increase the surface area Prevent the soft substrate was installed a damaged, or is blocking hole.
Locking method still has a lot of, this is just a very old some basic locking method, but also very practical.
Trampoline's role is to prevent the screw loose caused by the vibration of the machine or heat bilges cold shrink.Role is flat mat, increase the contact area of the screw and machine 1, 2, eliminate the trampoline at the time of discharge screw damage on the surface of the machine must be a spring when using a flat mat, flat pad close to the surface of the machine, spring cushion between the plain washers and nuts.
Flat mat role is long screw is screw is half buckles added flat washer cap can take full 2 is the place on the screw hole is too large added a flat washer not leak down
Trampoline is mainly used for locking, used in vibration is not big, if the vibration is big, generally want to use the double nut locking or other locking method, flat washer is mainly used to increase the contact area, like on the bearing seat because the drive is long and narrow hole, must be the home of the flat washer.
Flat mat increase the contact area, spring cushion is used for locking, when it is used in trampoline should pay attention to the direction of the opening, or the locking effect is not big.

DIN127 DIN128 Carbon Steel Zinc Plated M2-M100 Spring Washer Flat Washer

Flat and spring washer is generally used to distribute the load of a threaded fastener, such as a bolt, scres or nut. Other uses are as a spacer, spring (wave washer), wear pad, preload indicating device, locking device, and to reduce vibration , rubber washer. Washers usually have an outer diameter (OD) about twice larger than their inner diameter (ID).

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