I saved it into a step file. We are trying to get some
parts from a vendor who does 3D printer. Sorry, don't know
what he uses.He requested the step file. Said he couldn't
do threads using the cosmetic feature in SW and external
threads too. He made the comment that if he uses SW for
the modeling, the parts do not come out right. Dimensions
are distorted. Strange comment. Edited by: jmrec100
You can use a tapered helix with a swept cut. That adds quite a bit of size to the file though. What a lot of us do is download a pipe nipple from a place like www.mcmaster.com or www.grabcad.com and modify it to use in our designs.
I and most likely many of us then use configurations so we can easily suppress the swept-cut threads to speed up regenerations while we work on the file. What you should realize is that the shown threads from any downloads may only be an approximation, they may not be accurate.
Personally I don't suggest printing the threads. I would 'print' a hole that I could glue a nipple or half coupling into. The threads will be much stronger.