The information I supplied on the thread size for the 7/16“ outside diameter tubing was incorrect as Phak1 pointed out. The -7 fitting does have 11/16-18 threads. If you are willing to use 3/8”od tubing you could purchase the fitting shown in the earlier post and cut off the tubing just after the 90-degree bend and weld the 3/8 tubing to it.
