Proper method to Countersink #12 Hole

Section 11-5 step 5 figure 5 and 6.

Hello, I am attaching the VS to the tailcone and it states that the 2 bottom holes need to be match drilled to #12 and then countersunk. I understand that and the hole is now at a #12, but how do I properly countersink it? The largest countersink I have is a 1/8 100% and the 1/8 pilot will not provide proper guidance in the #12 hole.

Thank you.

RE: countersink #12 hole

http://www.browntool.com/Default.aspx?tabid=344&CategoryID=67&Level=a&ProductID=1979

Buy a #12 countersink.

Or, borrow one??

Simple Answer

Thank you for the replies. I looked in my tool chest for my countersink cutter case and saw a number 12 sitting there nicely nestled in its blue foam.

I have been using the #40 an #30 exclusively that I forgot I had those other countersinks.

I can now continue