Thanks for your input.
I have checked with Home Depot and Orchard (OSH) the only two that we have in our area and the OSH only has small one way screws #10 being the biggest. Home Depot shows a #14 on the web site but they do not stock them in the two closest stores. We also have a local chain of Ace Hardware stores but they only have small one way an Torx screws #10 being the biggest. Also I did not find what I needed at Grainger, I will check the other one.
Any other suggestions, anyone?