What thread size are the camshaft holder bolts?

[jimbo98]

I'm working on a '93 engine. Several of the female threads on the head where the camshaft holders screw down into have become stripped. This is the bolt I am talking about.:

https://www.cmsnl.com/products/bolt6x39_0910306071/#.XPGX2i2ZO00

There are two of these bolts that clamp down each camshaft holder. Eight in total. They are distinguished by the "11" on the head. I don't have a pitch gauge and my hardware store doesn't have one unfortunately. I also can't find the thread size anywhere on the internet and it's not listed on the wiki. I was wondering if anybody happens to know the thread size, because I have to buy inserts or helicoils to put in each of these holes.