It Does Not Matter How Many Fasteners You Have in Your Shop...

You will never have the right length, head, thread that you need.  In this case, I needed 6-32 nuts to hold the screws that hold the motor mount in place.  Since I have traditionally threaded holes, I seldom had many nuts to hold the screws.  In this case, I am going to use wingnuts to make adjustments of the motor relative to the polar axis easy.  I used to go to Ace Hardware for this sort of thing.  Amazon is cheaper and usually just as fast as driving down into Caldwell. 

The 6-32 brass setscrew may be another matter.