What is the principle of a nut that never loosens?

1, never loosen the nut The concept of "hard lock nut" is very simple, that is, insert a wedge between the nut and the screw to prevent loosening. \r\n2。 It is neither effective nor realistic to insert the wedge into the nut at the construction site. Two kinds of concave-convex nuts can be used on one screw. The nut protruding at the bottom is slightly misaligned (eccentric processing) during processing, which plays the role of a wedge. The nut with concave top is not eccentrically machined (circular machining), thus forming the role of hammer _ wedge. When these two nuts are combined into one, the problem of looseness is solved. \ r \ For detailed information about the principle that nuts never loosen, please visit:/ask/981EAA1615829499.html? Zd view more content