Bosch colt base screw

[tcoman]

Anyone know the specs for the Bosch Colt's (PR20EVS- 3601F0A710) base screws (parts list shows diagram number 860/880, part 2609199150, but the pic of that item is just the base, with four screws in the pic). I want to add a custom base, and the original screws are far too short. I'm guessing maybe a 4mm, but haven't a clue as to thread pitch. 8-32 doesn't work! Thanks!