The spiral groove around the shaft of a screw is called the?

The spiral groove around the shaft of a screw is called the thread. Threads are essential to the function of screws, as they allow for the screw to hold materials together by converting rotational motion into linear motion. The design of the thread enables the screw to dig into the material as it is turned, creating a secure fastening. This feature is critical in applications involving construction, machinery, and everyday household items, where a firm hold is necessary.

Other parts of a screw, such as the head, shaft, and point, serve distinct roles. The head provides the surface on which to apply rotational force, the shaft is the long part that extends between the head and the point, and the point is the end that penetrates the material. While all these parts contribute to the screw’s overall function, it is the thread that is specifically referred to as the spiral groove, underlining its importance in the mechanics of fastening.