"Impossible" Bolt and Nut Puzzle Illusion (Machinist's Trick)

thingiverse

The nut has complete freedom of movement along the length of the rod, setting it apart from other designs I've seen. If you decide to build one, please share your creation with me so I can see how yours turns out. This design combines elements from "NUT JOB" countersunk bolts and a standard nut without any modifications. For convenience, I'll upload my version for reference. To create this illusion, follow these steps: 1. Print both the bolt and nut simultaneously. 2. Pause the print when the thread is roughly halfway complete, then attach the nut to the thread and resume printing. Alternatively, you can also try: 1. Printing only the nut. 2. Print the bolt up to the midpoint, pause the print, then insert the nut into the thread and continue printing. This design achieves a truly trapped appearance, making it nearly impossible to remove the nut from the bolt.