Thanks for the reply. I'm trying to avoid taking the bolts out until I have suitable replacements. I have some spare D30 bolts, so I was hoping that if somebody could tell me if they are the same as the C8.25 bolts in terms of length and thread pitch, I could just go to the store to buy new bolts for the C8.25 cover.
If nobody knows the answer, I guess I'll just have to take one out of my C8.25.
By the way, what's the best place in Ottawa to buy specialty bolts, and preferably one that is open weeknights or weekends? I'm looking for bolts that will fit the C8.25, but that are about 1/2" longer, and have a smaller head than the stock bolts. I'm thinking of something that would use a hex key.