Drop-in t-slot nuts
thingiverse
The M3 nuts fit perfectly into the 20mm profile T-slot aluminum extrusions (like MakerSlide) without needing to be inserted from either end. Simply fasten a screw and turn clockwise to tighten, as this will rotate 60 degrees to secure it in place. Conversely, turning counterclockwise loosens the nut for easy removal. Tested with 20mm and 25mm profiles, but this parametric design should work for larger extrusions too. Share your findings if you discover settings that suit other profiles; I'll update the files accordingly. Note that initial prints failed due to insufficient material for proper shaping, so print multiple at once for cooling benefits. The provided scad file allows adjustment of duplication along X and Y axes.
With this file you will be able to print Drop-in t-slot nuts 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 Drop-in t-slot nuts.