Posted by mark dingbaum on Monday, July 15, 2002 at 10:57AM :
In Reply to: 318 question posted by Kevin in Arizona on Sunday, July 14, 2002 at 1:29PM :
Hi,
The corners are definitely 5/16 (NC), but those in the middle of the block might be 1/4 (NC).
I'd take both, to be sure, but most likely you only need 5/16.
good luck,
mark