This is a bajonet style adapter that holds two sheets of material together, i.e. like in a marketing display/stand.

This is built with a central cylinder diameter of 16mm and you will need a spring that fits into this diameter with an approximate length of 8mm.

You will also need one of the collet clips from this printable: https://www.printables.com/model/162000

Source code for this project can be found on Codeberg: https://codeberg.org/ofosos/display-quick-mount