HP Compaq Presario,Presario C300 Maintenance And Service Manual page 202

Screw Listing
mm
Where used:
2 screws that secure the fan/heat sink assembly to the system board
(documented in
Phillips PM3.0×6.0 Screw Locations
A–26
Phillips PM3.0×6.0 Screw
Color
Black
Section 5.17)
Table A-10
Qty. Length
2 6.0 mm
Maintenance and Service Guide
Head
Thread Width
3.0 mm 4.0 mm