Commonly known as hydraulic connections, they are the elements that connect the hydraulic tube or hose with the machine port to which the hydraulic tube or hose must be connected, they have two differentiated sides, that of the hydraulic tube or hose that consists of a tube with saw teeth on its outside that is inserted into the hydraulic hose and the threaded side that connects to the machine port

Hydraulic fittings can be grouped into two basic types, namely those consisting of two pieces, i.e. the connection and the bushing forming a hose junction between the bushing rings and the saw teeth of the compression connection, and the one-piece fittings in which the fitting and bushing constitute a single piece that are compressed to a predetermined diameter.