An M5 nut is a fastening component with metric threading and an inner diameter designed to fit bolts with an outer diameter of 5 millimeters. Commonly used in machinery, construction, and electronics, they provide a secure connection by threading onto the corresponding bolt. Made from materials like steel, stainless steel, or brass, they offer durability and corrosion resistance. The M5 nut can come in various shapes, such as hex or wing nuts, and is often used in applications requiring precision and reliability. They are essential in small to medium scale projects where accurately fitting components are necessary.