But here’s a version of the demo which is done with a proper metric thread profile (a 36x4 male thread):
I have added some notes to the grasshopper file:
helical thread demo v2.gh (40.9 KB)
But I’d stress that this is just a demo of how sweep2 can work OK in grasshopper for this. It isn’t a tool for generating threads (although it could be a starting point for one).
Regards
Jeremy