ScrewsScrews are a type of fastener that are used to hold two or more objects together. They consist of a cylindrical shaft with a helical thread that is used to engage with a corresponding thread in a hole or other mating part. Screws are commonly used in a wide range of applications, from assembling furniture and other household items, to securing components in electronic devices and machinery. There are many different types of screws, each with its own specific design and features. Some common types of screws include wood screws, machine screws, self-tapping screws, and sheet metal screws.