Geez. Transported my work-in-progress retro MTB to the LBS to get a headset installed and had not finished the brake set up yet. Somewhere along the way, the set screws vibrated themselves loose and are now roaming the countryside.
Anyway, now I need 4 of them. Any kind souls out there know what size they might be? I think most brands use the same size. And a 2.5mm allen wrench fits them.