A simple wall mount for all shelves in the Hexagon Shelf lineup that allows for stacking of shelves. They have a hole for a standard M5 screw. No supports are needed for printing.
Print in a stronger material such as PETG.
Use at least two mounts per shelf.
Hexagon Shelf Collection: https://www.printables.com/social/506030-prefectionist/collections/440614
Sturdy Mount: https://www.printables.com/model/383152-sturdy-hexagon-shelf-wall-mount
The author marked this model as their own original creation.