Creo ModelCHECK > start_config_options > Hole and Cut Diameter File
  
Hole and Cut Diameter File
Specifies the name of the external text file in which standard hole and cut diameters are listed in the start configuration file. For example:
STD_HOLE_DIAM_FILE c:\apps\mc\config\text\holes.txt
The hole and cut diameter file has the following format:
# ModelCHECK Standard Hole Size File
#
UNIT INCH
.125
.25
.375
UNIT MM
2.5
3
4
4.1
 
* The declaration of units must be in uppercase.