'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
A chainring bolt is an M8x1.0 and I expect that's way too big. I'd try an M5x.8 (water bottle cage bolt among many others) as a first quess and go up or down from there. These days hardware stores carry a wide variety of metric bolts and you should be able to find a replacement.