How about, Parker Flare Washers: https://www.grainger.com/product/PARKER-Flare-Gasket-For-3-16-in-Tube-5WRW0 Voi-Shan Conical Seals: https://www.electronicfasteners.com/wp-content/uploads/2014/09/linecard_rosan_conicalseals.pdf We did a lot of oil-cooled chill plates in military black-boxes. Most of the fittings we used were AN type aluminum and we used these to ward off leaks.
wow, so much info! thanks for all the replies. so if i'm understanding, the adapters for the proportioning value and the brake light switch are different fittings with different threads and those need to be sealed? i'm able to get rid of the brake light switch but is there a brake fitting adapter with the correct thread, that i can use on the proportioning valve? and if those adapters used to connect it are wrong, why are they included with the valve? thanks for all the helpful info and i will post any updates!
If they were included with the proportion valve they are probably correct. Do a little research on different types of threads it probably will help you along all throughout your builds. I am always checking the different charts that are available online.
You need to educate yourself the difference between NPT ( pipe threads ) and tubing 7/16 x 24 threads per inch. ( TPI ).
NPT = National Pipe Thread. This type of thread needs sealant. https://www.hydraulicsdirect.com/Fitting-Thread-Chart-s/1934.htm That is where your leak is coming from.
hey ya'll just wanted to update and thanks for all the helpful replies. after redoing all the lines with the correct process and sealing the fittings that should be sealed, and switching to the pedal operated brake light switch i'm pleased to say, no leaking anywhere! thanks again for all the great info! cheers!
I found on my trusty old [blue -point] flaring tool a similar problem and solved the issue by putting a few drops of oil on the tool threads and between the cone and the screw arbor . this allowed the cone to push the seat evenly.
Glad you got it fixed up. I'll often put the fitting on the line and tape it to the line to keep it in place, on he line until ready to bend line or install.
The Jalopy Journal
