a/c fitting size 15/16th ?

Hey guys.
So I am stumped. My caliper is out of batteries. (waiting on shipping)
The A/C fitting on my 92 xj from the compressor to Evap core has a larger size bolt on it (not the smaller one, I got that off)
I believe this may be a 15/16th bolt ? or maybe metric ?

does anyone know before I spend $30 on a flare wrench...

Thanks

I confirmed I cannot get a 7-8 socket onto it. and the 1inch goes over it. so it's like 22-25 metric (which I have none of) or standard 15/16th ???
Idk why people put such odd sizes on stuff.. oh wait.. yeah I do. It's Mopar...

I should say- This is through the expansion valve.

15/16th was too big for the one attached to the car- but correct for the 4 seasons hose. Made it work with the 15/16ths and some pb blaster