First, there may be some minor problems during the production of the hexagon socket bolts, which will cause the hexagon socket to be slightly too large. After using for a period of time, friction will cause slipping.
Second, the punch of the hexagon socket bolt is not very good. Another reason is that the three opposite sides of the hexagon socket of the bolt are not very symmetrical, or the angle of the cone angle does not meet the requirements during the production process, and is generally too large. Or the corners of the hexagon socket bolts are blurred and so on. Various reasons such as non-standard production, resulting in insufficient thimble depth, will appear to slip.
Third, the wire material of the hexagon socket bolt is not good, which will cause the bolt to be soft in terms of hardness and the wire purity is not enough. If this is the problem, the manufacturer can increase the hardness of the hardware screw by replacing the wire of the hexagon socket bolt. If you want to further prevent slippage, you can choose electroplating after the inner hexagonal groove is produced to prevent the slippage of the hexagon socket combination bolts after a long time.
Fourth, too much lubricating oil is used during use, which will also cause slippage of the hexagon socket bolts.