This mount sits on a PBC and avoids the circuitry on the bottom side of the OLED board to give it a firm mounting to the board without having to use brass standoffs. 

You can either screw the oleds down with m2 screws, or slip a segment of fillament through, and melt it on both ends like a rivet if you dont want to use screws. Hole diameter in the model is 2.3mm for slip fit on screws and 1.7mm filament