CZ858 butt stock bolt size?

[moogles]

Hello, I'm wondering if anyone knows offhand what size the bolt (or better yet the threads) is that attaches the butt stock to the receiver. I need to purchase a tap for modifying a stormwerkz hinge to accept mounting of the factory stock. Any information would be appreciated.

 

[jimbo14]

The receiver/bolt threads are M12x1.0mm. The pitch is quite fine for that diameter so you probably won't find this at the local hardware store. Good luck!