👉   Play freely and build endless fun at home with STEMFIE, the free 3D-printable educational toy   👈 

Some time ago, I changed the external shape of the threaded and cam-locking STEMFIE nuts to achieve a straightforward way to differentiate them. After gathering more experience and feedback from the STEMFIE community, I changed the design of the threaded nut to make it smooth. 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.

You can download the updated version of the nuts (.STL and .stepZ formats) from this link. The STEMFIE Project is designed in FreeCAD and Blender. You can download this FreeCAD scene file to see both nuts' differences.

Quick-print sample

STEMFIE.org Quick print sample shoulder screw pin nut washers brace

The STEMFIE Quick-print Sample file is an easy way to test a few STEMFIE parts and fasteners. You can also check the STEMFIE Calibration File for more elaborate types of fasteners.



STEMFIE is a free, open-source, 3D-printable construction set toy that helps children learn STEM! Download the files freely, and please support my efforts to expand this project.