Uxcell universal joint 5mm
grabcad
This thing. used for project.I didn't bother modeling the thread for the set screw. just made a hole.Go ahead and use this as a base and share your version with thread if you want.https://www.amazon.com/uxcell-Inner-Rotatable-Universal-Connector/dp/B00FHN5HZI/ref=sr_1_3?ie=UTF8&qid=1486737573&sr=8-3&keywords=5mm+universal+joint
Download Model from grabcad
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