I design this magic bolt and nuts using Fusion 360 in an extremely simple way. This time I use parametric modeling to design the model. You can change the parameter after finished the modeling to find the best parameters. If you use the same idea and concept you can design your model as well. They are very smooth and works very well. You can play with them like a musical instrument. They are just satisfying. I explained the detailed design idea and concept so even a beginner can follow.

I share my idea and experience with you and hope it can give you some help.

You can see the short video of these magic bolt and nuts play music on Youtube:
https://youtu.be/eRWR_HyqOzk

Detail information on Youtube:

https://youtu.be/uYm44Xx6lrs