It's unlikely anyone will need this exact print, but I think some may find the basic idea useful in designing their own brackets for similar applications.

As can be seen from the photos, I used these brackets to hand an antique Gilbert Chemistry Set on the wall of my shop; this is essentially a metal box about 45mm thick.

This hanger design has two benefits :

• It does not require attaching anything to, or drilling hole in, the box
• The box can be easily removed from the mount for inspection by simply sliding up the top bracket.

In use, the two bottom corner brackets (which are identical - one is just rotated 90°) are sized to the thickness of the box, and spaced according to the width.

The half-round top piece is screwed down at the required height, the box is inserted in the bottom brackets, and the top "hook" is slid into the top piece. Simply reverse the process for removal.

The OnShape 3D CAD files for this are here :

https://cad.onshape.com/documents/edac141e0aec8b6dffa97aec/w/7273fe05c33ebb8ad7a37c7c/e/c178a4fc42a30d231afc0d34

Print instructions

Print in PLA using the 3mf files provided.

It is likely possible to print all four pieces at once, but I did not try this.

Note that two of the corner bracket pieces are required.