A P.S....
You can't double flare Stainless steel... it cracks... so don't even try that...
The fittings you show in your picture are double flare... you don't want to over tighten this style of flare - the double flare kind of acts like a spring - and the nut is there to push on that spring loaded (kinda) fitting. In this case the nut does NO sealing - it only pushes the flare to seat.
Single flare 45 degree need a backing flare (forget the name of this piece right now) that the nut pushes against...
|