Here's why:
* Metals are good conductors: Metals have free electrons that can easily move, allowing electricity to flow through them.
* Screws are usually made of metal: Common screw materials like steel, brass, and aluminum are all conductive.
However, there are some exceptions:
* Plastic screws: Some screws are made of plastic, which is an insulator. These would not conduct electricity.
* Insulated screws: You may find screws with a layer of insulation around them, which would prevent electricity from flowing through the metal part.
In general, though, you should assume that a screw is conductive unless you know for sure it's made of a non-conductive material or is specifically insulated.
