Add this as a negative volume on your PrusaSlicer and you'll be able to add hanging slots to any of your prints quick and easy!

It works well for #6 screws. #8 screws are a very tight fit as-is, so just scale the model a bit larger and it will work for them as well.

For the metric world, here are the dimensions: The slot is 4mm wide. The hole has a diameter of 8mm. The slot is 8mm long. It will accommodate a head depth of about 3mm.

If you're resizing this to fit a different type of screw I'd recommend printing out a few test slugs to verify fitment. Each test slug should only take about 10 minutes to print.