3mm screw pad
thingiverse
Pad for 3mm screws. It is a tight fit, if you don't want that scale it up by 5% or so.
Download Model from thingiverse
With this file you will be able to print 3mm screw pad with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on 3mm screw pad.