Fake screw for Geocaching

thingiverse

This is a dummy screw which can be used as a logbook holder for Geocaching purposes. A pocket inside the nut accommodates a circular magnet (1cm in diameter, 2mm thick) if inserted during printing. If you print with 0.2mm layers, you can pause after the 14th layer to insert the magnet into the pocket. The magnet will then be securely trapped and no adhesive is required to make your cache magnetic. UPDATE: I now possess an Alfawise U20 printer, and its head is encased in a metal enclosure. As a result, the magnet becomes attracted to it if you pause before closing the hole. To overcome this issue, pause after printing the first layer that fills the hole and push the magnet through the layer. Since there's only one layer at this point, it shouldn't be too difficult. The magnet will then remain trapped in place. Additionally, the screw is not wide enough to stay securely in the nut when printed with my Alfawise printer. However, scaling up the print by 1% resolves this issue.