On January 6, 2023 at 14:18, SWOInstaller said...
It's just a different way of writing 2/3 or .066".
Well, that's screwy, because 2/3 of something is 0.66 of something, not .066 of something.
In all honesty it is 4" OR 6" deep for the people that may take 4/6" as an actual measurement
Those would be the people who use accepted norms for writing fractions.
Call 'em up before you make any holes and get 'em to tell you numbers that are incontrovertible.