What size hole to predrill for Oly Log Screw

[HouseBoy]

I have limited edge distance and therfore predrilling is required for the use of Oly Log Screws.
The "minor root" diameter is 11/64". What size pre-drilled hole should I use if straight bit holes are to be used?
Main shank is 12/64.

 

[dik]

Check with the supplier... but depends on the material. YOu could be looking at approx 75% of the minor root dia.

Dik