the male portion out of the female portion when the retaining member is unthreaded such as a two piece stake collar and ferrule arrangement on the other hand the hose receiving portion could be threaded for receiving a hydraulic fitting with mating threads generally if the threads are male threads on the hose receiving portion any mating female fitting that connects via such male threads on the connection portion may have a face equivalent to face 334 which can abut the end 234 of the retaining portion and thus facilitate disconnection as an alternate to relying on connected fittings there may instead be a c clip or other retaining clip or feature attached to the male portion which is specifically adapted to abut the end 234 of retaining portion 230 in order to facilitate disconnection of the coupling fig7 shows an embodiment of the invention in which the external threads which correspond to the retaining member are on the male portion in fig7 coupling system 400 includes male portion 410 female portion 420 and retaining member 430 female portion 420 has receptacle portion 422 insert portion 412 of male portion 410 fits into receptacle portion 422 with o ring 425 housed in seal retaining groove 429 on insert portion 412 the o ring thus provides a seal between the male and female portions retaining member 430 has internal threads 432.