Customizable Round Foot for Bolt and Square Nut
by wd5gnr, published
This is derived from the #6 foot for PCB I made earlier but is customizable.
Fill out the form. Make sure the bolt hole is shorter than your actual bolt so the nut can engage. That's it.
You can find tap hole tables on Google to determine the size of a clearance hole and/or the dimensions of the square nut size you want to use.
For example, a #6 bolt is 3.7mm and the nut is 7.9375mm.