Screw-on fittings are mechanical connectors that allow two or more components to be joined securely. They typically consist of a male and female part, where the male part has external threads that fit into the internal threads of the female part. This design ensures a tight seal, making them ideal for various applications, including plumbing and automotive systems. These fittings are commonly made from materials like metal, plastic, or rubber, depending on their intended use. They are easy to install and remove, making maintenance and repairs straightforward. Screw-on fittings are widely used in industries such as construction, manufacturing, and home improvement.