HP Compaq Presario,Presario R4000 Maintenance And Service Manual page 206

Screw Listing
mm
Where used:
2 screws that secure the volume board to the keyboard cover on
Compaq Presario R4000 models (documented in
Phillips PM2.0×4.0 Screw Locations
C–16
Table C-4
Phillips PM2.0×4.0 Screw
Color Qty.
Black 8
Length Thread
4.0 mm 2.0 mm
Section 5.9)
Maintenance and Service Guide
Head
Width
4.5 mm