3mm Machine Screw Gauge
thingiverse
This can be used to calibrate your designs to your printer. Basically I used this to determine the right sizes for 3mm screw hols and corresponding nut slots. Just print it and see what fits!
Download Model from thingiverse
With this file you will be able to print 3mm Machine Screw Gauge 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 Machine Screw Gauge.