Many project plastic boxes have integrated mounting standoffs.
These are great as they provide mounting for PCBs without the need to drill through to the exterior.
A little preparation is necessary to use this kind of enclosure.
If you don't have the exact enclosure measurement:
On transparency mylar material, mark centers for standoff holes and cut to the final size for a mounting panel, if one is used.
Transfer the centers and outline to 1.5mm acrylic material, cut out this outline.
Transparency mylar
Hammon 1599 plastic enclosure
Hammond 1599 PDF
