Most often hydraulic fittings are mistakenly mentioned as hydraulic adaptors – this is done not only by the common people but by some technicians as well. But the fact is hydraulic adaptor is not same as the hydraulic fittings. There are so many other components that are used as hydraulic fittings but hydraulic adaptors are specific component that are manufactured and used to join two or more than two threads. These threads are often different in forms and sizes from one another and the hydraulic adaptors are used to join them in the installation.