Patent ID: 7497483

Claim:
A tube conduit fitting, comprising: a male threaded nut and a female threaded body; a front ferrule and a back ferrule; said female threaded body including a ferrule camming surface that engages the front ferrule when the fitting is assembled onto a conduit end; said nut having a socket at one end thereof that at least partially retains said ferrules, said socket defined by a drive surface that forms a first angle relative to a longitudinal axis of the fitting, wherein the socket is further defined by a tapered surface that forms a second angle relative to the longitudinal axis of the fitting; said front ferrule having an outer surface at a rearward portion thereof that engages said tapered surface when the fitting is assembled onto the conduit end to a pulled-up condition; said back ferrule having a driven surface that is engaged by said drive surface when the fitting is assembled onto the tube end to said pulled-up condition; wherein said rearward portion of said front ferrule outer surface forms a difference angle with said tapered surface when the fitting is in a finger tight position.