Does anyone know why the hole wizard clearance sizes for screws does
not match those listed in the Machinery's Handbook? For example, if I
use SW to add a clearance hole for a #8 screw, it says the normal fit
is .177, but the Machinery's Handbook states it is .194. If I want a .
194 hole in SW, I have to use the loose fit (which isn't even an
option in the Machinery's Handbook).