What is a screw?

Screws are tools that use the physical and mathematical principles of oblique circular rotation and frictional force of objects to gradually tighten mechanical components. Screws are a common term for fasteners, commonly used in everyday language. Screws are an indispensable industrial necessity in daily life, such as tiny screws used in cameras, glasses, clocks, electronics, etc; General screws for television, electrical products, musical instruments, furniture, etc; As for engineering, construction, and bridges, large screws and nuts are used; Transportation equipment, airplanes, trams, cars, etc. use a combination of large and small screws. Screws have important tasks in industry, and as long as industry exists on Earth, the function of screws will always be important. Screws have been a common invention in people's production and life for thousands of years, and according to their application fields, they are the greatest invention of humanity.

The main function of screws is to connect two workpieces together, playing a tightening role.