Push-to-connect fittings, also known as quick-connect fittings, are a type of fluid connector that allows for quick and easy assembly and disassembly of tubing or hoses without the need for any tools or special skills. These fittings are commonly used in pneumatic and hydraulic systems to connect various components together. The fittings consist of a body, a collet, and an O-ring or seal. To connect the tubing or hose, the user simply pushes it into the fitting until it clicks into place. The collet then grips onto the tubing, creating a secure and leak-free connection. To disconnect the tubing, the user simply pushes down on the collet and pulls the tubing out of the fitting. Push-to-connect fittings are designed to work with a variety of tubing materials, such as plastic, nylon, and polyurethane. They come in various sizes and configurations to accommodate different tubing diameters and connection requirements. The fittings are also available in different materials, such as brass, stainless steel, and plastic, to meet different application needs. Overall, push-to-connect fittings are popular in various industries for their ease of use, reliability, and versatility. They offer a simple and efficient solution for connecting tubing or hoses in fluid handling systems.