Odd small metric fasteners metro Philly-ish

I need some very small stainless button head screws for a piece of scientific equipment.  Is there a local source for fasteners in the Philadelphia area?

In reply to glueguy (Forum Supporter) :

Fastenal ?

McMaster-Carr has a warehouse near Trenton. Play around on their website...they have everything.

Not local to Philly but Bel Metric is good and fast. I've gotten M3 and M4 button heads from both Bel and McMaster.

Grainger

Check your local Ace Hardware, they usually have a surprising assortment of fasteners.

Hobby shop.

Appleseed said:

Hobby shop.

Potentially genius solution