Impossible Nut
prusaprinters
The Impossible Nut is a print in place bolt with two ends that can not be removed but the nut on the bolt spins freely. The nut will need support when you are printing it. I allowed for tolerance of the print but if you are printing the nut a different color than the bolt you will have to figure out the placement up the bolt yourself. The pitch is 1/8th but check your slicer preview to make sure the nut is not hitting the bolt during your print. This is a video on how to create your own threads in onshape. (Reddit post that has a gif of it working https://www.reddit.com/r/3Dprinting/comments/twulgf/the_impossible_nut)
With this file you will be able to print Impossible Nut with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Impossible Nut.