Coarse thread and fine thread screws are used for fastening purposes.
Fine tooth screws are generally used to lock thin-walled parts and parts that require high vibration resistance. The self-locking performance of the fine thread is good, so the ability of anti-vibration and anti-loosening is strong, but due to the shallow thread depth, the ability to withstand greater pulling force is worse than that of the coarse thread.
When anti-loosening measures are not taken, the anti-loosening effect of fine thread is better than that of coarse thread, and it is generally used for thin-walled parts and parts with relatively high requirements for anti-vibration.
When used for adjustment, fine thread has more advantages. Disadvantages of fine thread: It is not suitable for application on materials with excessively thick tissue and poor strength. When the tightening force is too large, it is easy to slip.
