If you turned the inner fitting enough to unthread it from the block, the tube now looks like a corkscrew, since it's probably firmly attached to that fitting. Threading the inner fitting back in is unlikely to help. You will probably need to go ahead and replace the tube.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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