Threaded Pipe fitting and nut

thingiverse

Working perfectly pipe fittings are always useful, just download the attached FreeCAD file to start editing - modify those numbers to fit your requirements, don't forget that the threads have got to be wide enough for a good seal. Printed out on my trusty ABS 3D printer and cured with a gentle stream of acetone vapor seals in any tiny air pockets and after a simple squeeze of some piping glue it's fixed in place. Now just screw in the nut, turn tight and you're all done!