anti-screw pipes

[Kaji]

hi I have a 3/4" trek tube about 2 meters long bound to a hanging pump that does up and down, the customer fears that in the descent movements, when the tube leans, can unscrew; I asked if a bf type end fitting (female box) was sufficient or a flanged was required.
thanks to the availability.

 

[meccanicamg]

with the flanged, make sure it doesn't unscrew... it seems obvious. a thread can loosen as it is not in chain cable.

 

[Kaji]

In fact, even if the terminal part of the hose is flangeed, then sooner or later I have to connect to a gas thread then the problem is resumed when I connect parallel two cylindrical gas threads, probably instead the output with the female bucktton makes sure that any movements of unscrewing are compensated inside the bochettone itself.