The term "screw" can refer to different concepts depending on the context: 1. **Mechanical Fastener**: In mechanical engineering and construction, a screw is a type of fastener that typically consists of a cylindrical shaft with a helical ridge, known as a thread, wrapped around it. Screws are used to join objects together, holding them securely in place, and can be driven into materials such as wood, metal, or plastic with a tool like a screwdriver.
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