I wanted to mount some small wooden boards at the top of my 4mm thick pegboards to display some small prints. My boards were not all of the same size so I made a model in Fusion 360 with modifiable parameters to allow me to quickly generate print files for a variety of board sizes and potentially fit different pegboard thicknesses.

I have included stl files for the 4mm pegboard that work with boards of 78mm and 89.5mm widths. Printed flat with no supports with 0.4 nozzle and 0.2 layers.

To adjust the f3d, modify Sketch 1. Currently it is set to fit a board of 89.5mm wide, so modify that value to the width of the board you have.