A machine screw is a type of fastener characterized by its cylindrical shaft and a helical thread that extends along its length. Typically made from materials such as steel, stainless steel, or brass, machine screws are designed to be used with a nut or tapped hole, allowing for secure fastening in various applications. They are commonly employed in machinery, electronics, and construction, where precise alignment and strength are essential. The head of a machine screw can come in various shapes, such as flat, pan, or hex, enabling compatibility with different tools and providing versatility in assembly processes.