I can't tell you right off hand, but what I like to do is run by Ford, tell then that I'd like to price something. Then I say thanks and , "Oh, what size is that anyway?" They tell me and then I go, "Hmm, really, course or fine thread?" It's not pretty, but it works.
Then it's off to the parts store. Or if it's only a buck or so, just anty up at Ford.
Something else that works. I don't know if you happen to know any Ford Mechanics, but I've just walked into bays at the dealer before and asked about little stuff like that. Sometimes they have extra stuff like that laying around and will just give it to you, free of charge. I've gotten a few things like pinion nuts, drain plugs, and battery wedges by just chit chating with them.
I don't recommend trying that on a regular basis though, LOL