Dual threaded screw fidget
thingiverse
Threaded rod that have threads in both directions. fun fidget or mechanical demonstration. There are multiple lenghts of threaded rod. Depending on your printer i made nuts with 0,2mm clearance and 0,3mm clearance so you can get the fit you want, im using the 0,3mm one. please ask if you want any more :) To get the nut in the opposite direction just mirror it in your slicer. here is video of it in action: https://youtu.be/umbElFMv_oM https://youtu.be/8QwOb9qdXrs
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