Three combination screws are also called three combination screws. Therefore, the name means that a screw is matched with a elastic pad and a flat pad. After that, the screws are combined by twisting. The combination screws are divided into iron and stainless steel. For iron, there are screw wires 1010, 1018, 10B21 and other screw materials. The general pier of iron needs to be electroplated, and electroplating is divided into environmentally friendly and ordinary ones. For example, there are environmentally friendly color zinc, environmentally friendly blue zinc, white zinc, color zinc, white nickel and other electroplating. Stainless steel triple combination screws. The material is 304 stainless steel.

Three combination screws are mostly used for the connection between thin metal plates and play a connection role. When connecting, first make a threaded bottom hole for the connected piece, and then screw the combination screw into the threaded bottom hole of the connected piece. Due to the high hardness of the thread surface of the combination screw, the internal thread can be tapped out in the threaded bottom hole of the connected piece to form a connection.