Summary

The four hole button on my summer pants fell off and I needed a quick replacement. Since the stiched ones fall off all the time I decided to go a different route. This one uses a M3 hex screw and a M3 nut.

For some reason I had a little trouble with FreeCAD 0.17 (daily) cutting out the nut (usually a trivial thing to do) so I did it with FreeCAD 0.16, that is the reason for the two FreeCAD files in the download section.