Some time ago, I changed the external shape of the threaded and cam-locking STEMFIE nuts to make them straightforward to differentiate. After gathering more experience and feedback from the STEMFIE community, I made the threaded nut smoother. This makes it clearer to see the difference between them when looking at a pile of both kinds of nuts. In other words, the threaded nut is smooth, and the cam-locking still has its longitudinal slot.
Updated threaded STEMFIE nuts
