I believe they are 12mm bolts 1/4 diameter 1/2 inch long corse thread. Could be wrong but I know the heads were 12mm.
Just for future reference, the size of the heads is not the bolt size.
sorry next time i'll make sure i don't respond so late at night. that way I can make sure i can say head size instead of bolt. my bad for trying to help...:dammit: