Looking for some 3.5mm nuts. The O.S. muffler bolts on both my O.S. engines use a 3.5mm nut. Lost the nut on a flight last weekend and want to make sure I don't loose the muffler bolt/half. My local True Value hardware section only carries 3mm and 4mm hardware - no 3.5mm. Local nut and bolt specialty shop is out of 3.5mm hardware.

Anyone know where I can getsmall hardware easily via mail order? Maybe a hardware site that does small orders?

Appreciate any input.

somegeek