What size screws for Surftech Bark Competitor 12'6" Handle Inserts?

[cakemonster]

Hello,

I have a Bark Competitor 12'6" in Surftech but didn't get a handle with it.  I ordered a handle from surftech through local shop, but no screws came with it.

Does anyone know the length/thread for those inserts (I think plastic self tapping inserts, but I don't want to go too deep, crack glass etc.

If anyone knows I would really appreciate it. 

http://shop.surftech.com/Bark-1206-SUP-Race-Tuflite

[levity]

Contact Charlie at the shop:  310-381-9347

or email Joe online, he does reply:  http://www.joebark.com/contact