What is the self-tapping screw

The biggest characteristic of self-tapping screw is that it does not need to be used with nuts, and can rely on its own thread locking and connection. It is a very common and commonly used screw in daily life. When the self-tapping screw is screwed into the hole on the plastic metal material, the internal thread can be formed in the hole by the action of extrusion, which is the secret of the self-tapping and self-drilling of the self-tapping screw. Among them, a special self-tapping screw used for metal hole tapping thread is called wire tapping.