Yes, 14mm 12pts and they are indeed smaller than the washers.
Not all of the holes are giving me trouble, just the corner ones.
It just occurred to me that this could be an issue unique to me since i'm using a 2g head with the holes drilled out to fit 1g arp studs. I'm sure the 2g arp stuff would fit, but its too late for that now!
I need to figure this out!