HP Compaq nc6220 Maintenance And Service Manual page 169

Screw Listing
mm
Where used:
4 screws that secure the hard drive frame to the hard drive
(documented in
Phillips M2.5×4.0 Shoulder Screw Locations
C–6
Phillips PM2.5×4.0 Shoulder Screw
Color
Silver
Section 5.3)
Table C-3
Qty. Length
4 4.0 mm
Maintenance and Service Guide
Head
Thread Width
2.5 mm 4.0 mm