JIC 4. - The male portion should be a 7/16 x 20 thread.Maybe pictures will be helpful.
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FYI- I was wrong on the size. They are NOT 1/4 JIC-4 Still trying to get the proper size identified in the thread below.Confirmed they are JIC-4 1/4" . Thanks for the help.
Confirmed they are JIC-4 1/4" . Thanks for the help.