This knob is for my 6040 CNC. I used the source design and made the nut hole a little bit bigger. Thanks to the source designer Selphb. The knob matches my other knobs.

THIS IS A REMIX. I entered it as a remix but because Thingiverse is loaded with bugs, it refuses to show the attribution to the original which I entered. Here's where the original came from:

6040 CNC router axis knob by Selphb