laid this down on his screen :
Here's the steward of the bar in question
http://i66.tinypic.com/xoprer.jpg

That is a mess. Those places where I see PTFE poking out, look to me as
if they were intended to have a fibre washer fitted between flat faces.
You might get PTFE to seal, but only if you can get a regular layer of
PTFE around the threads and of just the right thickness, which is
unlikely - so it will leak.