Screw jack

An inclined plane wrapped around a shaft is known as a screw. The two primary functions of a screw are to hold things together or to lift objects. The threading around the shaft in a screw makes it an efficient tool to hold things together. The threads grip the surrounding material like teeth, resulting in a secure hold.

A screw is just a specialized version of the inclined plane. A bolt is a screw that is meant to slide into a pre-grooved receptacle with matching threads, such as a nut or a tapped (threaded) hole.

A few examples of screws include screw, bolt, clamp, spinning stool, and spiral staircase. A car jack is an example of a screw used to lift something.

A car jack is a mechanical device used to easily lift heavy loads cars, to gain an easy access to sections underneath vehicles or to simply just change a wheel. The most important fact of a jack is that it gives the user a mechanical advantage by changing rotational force into linear, allowing the user to lift heavy structures up that would be impossible to do without this tool.

JAES Company. (2020). What is jackscrew and how it works (Standard YouTube licence)