Knob
thingiverse
I needed a knob so I created one. I included the Fusion 360 file so you can alter it to fit whatever nut you need.
Download Model from thingiverse
With this file you will be able to print Knob 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 Knob.