1. Force condition
Due to the difference in the shape of the two screws, the degree of force between the two is also different. Generally speaking, the force of the flat head screw is greater than that of the countersunk head screw. Especially when countersunk head screws are screwed into objects, it is more obvious.
2, aesthetics
After the countersunk head screws are installed, we will find that almost all the screws are cut into the product. The head of the countersunk head screws is flat with the surface of the product and feels no strange to the touch, while the head of the flat head screw is in a protruding state, and the entire flat head screw is in a protruding state. The head is bare and feels strange to the touch. So many product shell screws will use countersunk head screws as fastening, because they feel better and look more beautiful.
