Glass bowl fuel pump question

[Tom in TN]

Does anyone know what the thread size of the pump's outlet is?
I do know that it is NOT 1/4 NPT, but what the heck is it?

 

[Zeke3]

It seems there are two different versions of this style of fuel pump, check out post #8 in the attached link. I need to go through my stash of pumps to see what varieties I have.
https://www.fordbarn.com/forum/showthread.php?t=323979