1/4 inch nps-18 threads per inch to inverted flare female Is what you broke. 1/4 inch male to 6an male if you want to go to an fittings.

Summit has a bunch of different brands available. https://www.summitracing.com/parts/ear-940006erl?rrec=true

Yours has the metal crush washer. So stick with that type over the o ring type usually found on the Turbo 400 trans.

 

Thank you. I had to resort to Amazon, as I want to get it back together and Summit won’t ship until the 28th.

On a related note, I’ve never been able to figure out thread sizes past the standard USS and SAE. Those make sense. But how is it that a 1/4 NPT or NPS fitting is slightly larger that 1/2” in diameter? I can only guess they are talking about threaded pipe with an inside diameter of 1/4”?

Those and tubing fitting sizes make my head spin.

 

I have plenty of used stock fittings if you still need one....cost of postage only charge

 

Thank you for your offer. I ended up buying some fittings to adapt -6AN hoses to the case. I honestly don’t think this TH350 is going to last very long and it dawned on me that 1) lining up and tightening the stock inverted flare fittings is a nuisance, and 2) once I have the AN fittings on my stock lines I can easily make hoses to fit whatever transmission I may replace it with and not have to wrestle the hard lines into submission.

Tom.

 

The hole in inverted flare fittings is the clue, they fit the tubing snug.

 

Yeah, but for this job I needed an adapter fitting to go into my radiator so I could add an auxiliary cooler off of that port. So no 5/16” line. Just the fitting. Good news is that I’m just smart enough to know what I don’t know and Team Chevelle can usually get me a quick answer!

 

:thumbsup: