Universal Desk Mount

A model I put together from a couple of other peoples models so that I could mount a switch box I made for simulation games to the side of my desk.

It does require some additional fixings to clamp the pieces together.
1x 6x60mm bolt (hex or round head)
1x m6 nut (hex)
3x 5x20mm bolt (hex or round head)
3x m5 nut (hex)

Plus whatever size bolts are needed to fix the plate to the item you want to mount.
I would also recommend using either glue or heating up the metal components in some places so they bond to the plastic component for less slippage.