Manual says to use drill bits as gauge but numbers?

You gotta be kidding me. Any tool store that does not stock common number-sized drill bits is not a real "tool store".

That reminds me of a favorite quote, " No lawnmowers, What kinda damn drugstore is this ?!?!? " Charlie Burnett
I did drive way across town to that one store that would have a special tool a few times.
Never for special diameter drill rod called out in a carb rebuild.
No real reason for the engineers to do that anyway :wack:
Unless.... International application played into it. Some have inch scale drills on hand while others have metric on hand. Call out neither ?