Plain washer

Plain washer refers to the part between the connected part and the nut, generally a flat metal ring, used to protect the surface of the connected part from nut scratches, and disperse the pressure of the nut on the connected part. Because of the special process, it can better fit with the connector to prevent loosening. Its main function is to increase the contact area, disperse the pressure, and prevent excessive pressure damage. Can be divided into flat washer, square flat washer, heavy flat washer, plum washer.