As per the title this is a pretty dumb question, but here goes:
Every time I do something/order something I have to make the trip to the hardware store to get the bolts to attach said item in place. I have a lot of general purpose hardware around the house, but not much in the sizes used by the machine.
So I plan to order an assortment of bolts from the net (probably ebay) so that I have a stockpile of stuff on hand. So what sizes are more frequently used? Which ones do you always wish you had more of?