I think Mezz uses them. There wavy.never heard of it. this will get a LOT more traction in the 'Ask a Cuemaker' section.
Tiger uses 3/8-9 ACMECan so one tell me what cue makers use a 3/8-9 joint pin?? Ed
ACME has a square shaped thread, it's basically the same style of thread geometry you'll find on a lathe or mill leadscrew.Another one? hahaha.
Does it look like a normal 3/8-10 only with a different pitch? Or is it a completely different thread form?