LRod said something like:

....[rip]...

There is an article at WoodCentral which has the correct sizes of
drill bits for screwhead, shank, and root diameters of common sizes.
There's also drilling and tapping information for metal work.

http://www.woodcentral.com/articles/...cles_713.shtml


I never quite realized that there were numbered and lettered bit sizes for
intermediate widths.

Makes more sense than things like 37/256th 's. Unless they are primarily
metric.


....[rip]...