The flat washer is mainly stamped out from iron material. The shape is generally round or square with a hole in the middle. The size of this hole is generally corresponding to the diameter of the bolt and can also be formulated according to customer requirements.
Generally, the same specification of the bolts with the use of the flat washers, the hole diameter of the washers are the same but the outer diameter and thickness are different. For example, M10 bolts are equipped with a flat washer with an inner hole of 10mm, and the outer diameter and thickness are not fixed.
The flat washer is mainly used to reduce the pressure. When the axial force is tightened in some parts, it is easy to make the washer compressed into a dish shape. At this time, the material can be changed and the hardness can be improved to solve the problem. The locking effect of the spring washer is relatively general, and the important parts are used as little or as little as possible. The self-locking structure is used. For the spring washer used for high-speed tightening, it is best to use a phosphating-treated washer to improve its friction reduction performance, otherwise, it is easier The friction heats up and burns out the parts or causes the parts to open, and even damages the surface of the connected parts. The spring washer structure should not be used for the connection of the thin plate.