Look for a file named C:\Program Files\SolidWorks 2012\SolidWorks\lang\english\calloutformat.txt
You can edit this file to have it change the default variables that are pulled from the database during the Hole Callout tool. It's just a text file and not hard to do, just tedious to find all the types and standards that you need to update.
I have that file. Here is the code.
The problem is that the "Machine Threads" langauge seems to be embedded with the <cthrd-size>.
Does anyone know the proper code for me to put in to get 1/4-28 UNF-2A as an output? Is there another table I need to edit to remove the "machine threads" from the <cthrd-size>.