Today I dug out some of my old model stuff for the first time in years to do some airbrushing, and found that my Paasche H was missing a piece: the tiny set screw that holds the needle close to the aircap.

After doing a quick search, I found a few websites where I can get one for $3 - 5. I'm not against paying for it, but that seems a bit steep for a tiny screw that's less than 1/4" long... Especially since I'll have to pay for shipping too.

Can I find this type of thing at a local hardware store? If so, where would I look?

I don't want to be the 'crazy guy' that walks into Lowe's, looking for a minuscule piece of hardware that I don't know how to describe...

Yeah it can... but go to a true Hardware store.... not the "big box" ones (Lowes, Home Depot or Menards)

Take the airbrush body with you when you go and they should be able to hook you up.
Shaun
If you have problems PM me and I will tape one to an index card and mail it to you.