HELP, does anybody know caliper bolt size?

does anybody know the bolt size for the calliper bolt on an 89 civic dx, i need both the head and thread sizes if at all possible, thanks

I just brought one into a local shop and they told me there, but i forgot what it was.

well they were the wrong bolts in their, they both snapped and had no hardinging marks on them, i had to drill them out, the wrong ones came out the back and i was able to save the original hole and threads in it, i just need to know what size i should replace them with, and the hardness if anybody knows. i was thinking 3 to 5 marks

If you have metric thread guages and a set of calipers, just measure the whole size (porb metric) the size of the whole will be the bolt size and just match up the thread on a set of guages and then you have it. And if you have one made metric by a machine shop or u do it your self, remember you have to change the gears in the lathe to cut the metric threads.

lathe threading is outdated, you use a dye, and if i had the metric tooling to do it, i wouldnt of needed to post lol, all my equipment is for the english system, damn forign cars lol, i was hopeing somone would just happen to know and then i would do it at school or buy the bolt if possible