DIN 125 washers used to reduce friction, prevent leakage, isolate, prevent loosening or pressure dispersion. They are found in many materials and structures to perform similar functions. Limited by the material and process of threaded fasteners, the bearing surface of bolts and other fasteners is not large. Therefore, in order to reduce the compressive stress on the bearing surface and protect the surface of the connected parts, the washer is used.
A flat washer is mainly used to reduce the pressure, when some parts of the tightening axial force are very large, it is easy to press the washer into a disc shape. At this time, materials and hardness can be used to solve the problem.