1. Flat-head screws. From the appearance point of view, the angle between the head of the flat-head screw and the connecting part of the bolt is 90 degrees, and the head of the flat-head screw is very thin. It is suitable for connecting mobile phones, watches, and other precision electronic product components.
2. Pan head screws, whose heads have obvious arcs, are generally used on inner workpieces or workpieces that are invisible.
3. Countersunk head screw, which can screw the entire head of the screw into the workpiece without protruding the head of the screw. This type of solid connection is generally used on the surface of the external workpiece to make the surface of the workpiece smooth.
4. Hexagonal screws are often used in machinery. They are mainly easy to tighten and disassemble, and are not easy to slip. For example, the hexagonal screws currently on the market mainly include carbon steel, stainless steel, and copper.
5. Large flat head screws, their heads are larger than those of semi-circular head screws, and the force-bearing area is also larger. The product is at the screw joint.It is not easy to be damaged and is usually used between plastic parts.