These guys list 2 different sizes.
What is the standard size that fits on faucet shanks and couplers coming out of jockey boxes?
Or are their multiple sizes for this "standard"? Nuts For Beer, Wine, Ale, Aren't We All?
The standard beer thread is 5/8" bspp, which also works out to 7/8" x 14. In my keezer history I have bought shanks and tailpieces claiming the latter, and recently converted to John Guest Push-to-Connect fittings where the part that screws right onto my shanks is 5/8" bspp...