On Thu, 05 May 2011 15:27:36 -0500, Karl Townsend
wrote:

Title about says it. I need a 7/16 x 20 square nut.

Do I have to make my own? No joy at fastenall or mcmaster.

Karl

I can't recall ever seeing a square nut in a fine thread, only coarse.
Are you replacing existing?

Pete Keillor