2-way bolt and nut

Made a bolt that threads both ways.  A fun toy to fidget with and keep yourself occupied.

This model realistic trapezoid style  thread profile instead of triangular to move better and be easier to print. I also made it hollow to use less filament. The model has 0.05 in of clearance for the nut but that could be increased by scaling the X and Y axis in the slicer. 

I redesigned this based off of gvera's Two way screw (Thingiverse thing:4690959).
Original concept of the two-way bolt and nut comes from videos by Олег Певцов: https://www.youtube.com/watch?v=cDfMI5ahbJI and https://www.youtube.com/watch?v=h8sRZJbIHlY.