KJ,
Why do you say inappropriate...
Having just picked up a Mike Guylassy wit ha 3/8 - 10 Acme (built in 2005) I am curious...
-Joe
ACME threads are for moving loads such as 500lb milling tables and 100lb+ lathe carriages.
I don't see their application in a cue appropriate because they are unnecessary,
it's the wrong application of the thread and yes, that thread WILL strip-out the shafts threads.
The last Kikel that came my way for repair was because the pin had stripped-out the shaft.
The owner of the cue asked that I pull that bastard pin and install something more practical.
I gladly complied. That was over 10 yrs ago and I've heard no complaints since.
In machinery, the corresponding 'nut' is metal, brass, hardened cast iron or forged steel.
Even they wear quickly. In machinery it's called back-lash. In a cue it's called a disaster.
'Different' and 'looks cool' may be appealing to some until you need to have work done on the cue.
At that point, all I can tell you is good luck with that.
Opinion aside, isn't it strange that more cue-makers haven't gravitated towards using that pin?
KJ