I am trying to make a solid with internal threads. I can make a bolt put it in the solid and then perform a boolean difference. The difference fails. I have also tried creating a thread with surfaces then use the surfaces as trim edges and trim. When I attempt to union the threads and block it comes back objects do not intersect nothing done. To make an object that can be used for injection molding the threads HAVE to be part of a single solid.
What am I doing wrong?