Whats thread size for heater control cable screws?

[wh23g3g]

I need to know the thread size for the screws that hold the clips on the heater box at each door control cable. I don't have an original to match up and I keep buying little screws that are too small or too big. I tried to get an OEM number out of the Chrysler parts catalog but didn't see one. They screw in through those metal clips and clamp the heater control cables down tight to the heater box doors.