Screws are not strictly defined in the industry. Generally, nails or steel nails are not threaded in the nail body; screws are called threaded parts.

Screws are commonly found in machinery, electrical appliances, and buildings. They are usually made of metal or plastic. They are cylindrical, and the grooves on the surface are called screw threads. The thread is a helically inclined surface that surrounds the side of the screw, allowing the screw to be screwed to the screw cap or other object. The inside of these objects has a thread corresponding to the screw, called the internal thread. Generally, the inner screw of the screw cap or other object needs to be separately processed. The self-tapping screw can cut the internal thread on a soft object, so no special processing is required. Taihao Warehouse Haojing Technology Co., Ltd. is located in No. 188, Luxin Road, Taicang City. It is a professional manufacturer of expansion screws.

The main function of the screw is to join two objects or to fix the position of an object. Screws are usually free to remove or re-tighten without compromising efficiency, and provide more force than nails and can be reused.

Generally, the top diameter of the screw is large. Commonly, there are round, square or regular hexagons. If the top is a regular hexagon, you can use a wrench to turn the screw. If the top is round, the top of the top will have grooves (grooves). It is convenient to use the corresponding screwdriver to turn the screw. The most common groove types are a type, a cross, a square, and the like. The more prominent top also allows the screw to not drill too far through the material and increase the pressure on the material from the screw. Some screws do not design a larger diameter top. For example, a set screw is an example. The screw can be locked into the workpiece of the corresponding specification without any exposed parts.