Here's my version, setup for pin-lock kegs.
I followed the examples previously given and cut off the nozzle end of the sprayer. I trimmed the shape down with a razor blade so that it was more cylindrical than cone shaped. I tried to force it on and use the pin-lock post to thread it without success.
Used taps to figure the pin-lock post was threaded 9/16x18 inside, so I trimmed the nozzle down to a little proud of 13mm by threading the nozzle onto a 5/8x11 tap and mounting the whole thing in a drill press. A mill file a few minutes later I had it trued up and "turned" down to 13mm+ and was able to use the correct die to cut 9/16x18 threads.
A little teflon tape and ready to clean.
The moral of the story, if you can't get the forced-threading to work, find a friend with a SAE tap set.