1. Insufficient tightening
When screwing Socket head screws, if the pre-tightening force is insufficient, it will lead to insufficient tightening or false tightening. In this way, after a period of use, the joint part of the bolt does not have sufficient pre-tightening force, which will cause the bolt to suffer from All aspects of the stress and loose.
2, vibration
When Socket head screws are in a vibrating environment, there will be many small "lateral" movements, which will cause repeated movements of the bolt connection part. These movements will offset the friction between the bolt and the connection, resulting in The bolt threads are loosened.
