Hi, I like the way it is done here <https://hackaday.io/page/5252-generating-nice-threads-in-openscad> . The lead-in / lead-out tapers are nice. I built upon that to create an entire library of threads <https://github.com/adrianschlatter/threadlib> : With it you create threads by simply naming the designator of the thread (e.g. “M6-ext” or “G3/4-int”). Currently, it has metric screw threads and British pipe threads. Regards, Adrian ----- -- Sent from: http://forum.openscad.org/