First time brake line repair, not so smoothly.

I blew a rear line just before the load sensing proportioning valve and noticed that the LSPV was corroded badly. I replaced it with a single inlet/outlet valve and eliminated the return line.
I ran into a few problems around the brake T's or junctions. This particular junction is in the rear end, just above the axle, ignore the sliced line. I wanted to replace another faulty line but I cannot seem to find the proper replacement fitting. The one that came out looks similar to this, with a threadless end. What I'm running into is that, even after tightening the nut in, the brake line will not tighten up and snug up against the flare. My flares are all double.

As a newbie to brake lines, what advice can you give me? Thanks!

 

There are long and short nuts in this place you might need a short nut .

Just curious why you put your valve in such a hard place to adjust

I have found my experiences with the LSPV the best is just not to touch it or just remove it

 

Did you check the condition of the corresponding cone/nipple? Is the tube loose enough to noticeably move, or does it seem snug but leak? If it seems snug but leaks, make sure you have smooth contact points (no line on the tube from the tools) and that the flare is straight and centered (relatively). If it is loose, make sure nothing is binding up in the treads.

 

are your fittings the correct thread?

I did this over the summer, maybe it will help.
https://www.tacomaworld.com/threads/bretts-average-build-thread.305098/page-28#post-12388470

 

Just re use the old fitting, grind off the end where you cut it flush with the fitting, use a small punch to get the rest of the line out of the fitting, wire wheel to clean up the out side and an appropriate size drill bit to clean up the inside. Don't forget to put the fitting on the line before you flare it