1,The spring washer expansion ring phenomenon, generally not the spring washer itself.

2, The spring washer fracture expansion ring phenomenon, generally not the spring washer itself.

3, The outer chamfer of the nut supporting surface causes the radial component of the axial clamping force, which makes the opening

of the spring washer expand. The smaller the diameter of the chamfer, the more likely it is to swell.

4. Adding a flat washer between the nut and the spring washer helps to slow down or prevent the expansion of the ring, but the flat

washer is too thin or too soft to prevent the expansion of the ring.

5, Spring gasket hydrogen embrittlement fracture is generally caused by unreasonable heat treatment process, and there is no timely

hydrogen removal treatment after electric galvanizing.