Hose fittings are available in both male and female threaded ends to connect with
each other but usually they are demanded in female ends as a set standard of
equipments worldwide.
Their sole purpose is to provide correct orientation to the circuit and then it is tighten.
It may also be used for a quick disconnection of any hose at any point of time
depending of the usability of the equipment without much hassle and without
any major changes or technical modification in the hoses so as to change
the functionality of the whole equipment.