The loose screw adopts the design of adding a small diameter screw. With this small diameter screw, the screws can be attached to the connector, ensuring that they do not fall off easily. Unlike conventional screws, the loose screw does not depend on the structure of the screw itself to prevent falling off, but realizes the function of preventing falling off through the mating structure with the connected part.
When the screws are installed, the small diameter screw is snapped together with the mounting holes of the connected piece to form a firm connection. This design greatly increases the robustness and reliability of the connection, whether it is subjected to external vibrations or heavy loads.