Yup, you did that in Post 1329... I remembered it. I just haven't had any luck finding another nut. I'll measure again - it would HAVE to be a SAE or ANSI thread, not a metric one. That engine was made in the good ol' USA. A good set of calipers and a magnifying lens will let me determine the pitch count of the threads. I'll check the junction of the mixture disk and the thread again with a magnifying lens to see if they are separate. I just don't want to force anything...
I just keep remembering an old saying that my dad taught me. "Brass to Brass, don't break your A**" :-) :-)
I'll let you know what I find out for the thread.
Bob