HP Compaq nc6220 Maintenance And Service Manual page 192

Screw Listing
mm
Where used:
4 screws that secure the hard drive frame to the hard drive (documented in
Section 6.4)
Phillips PM2.5×4.0 Shoulder Screw Locations
C–6
Phillips PM2.5×4.0 Shoulder Screw
Color
Silver
Table C-3
Qty. Length
4 4.0 mm
Maintenance and Service Guide
Head
Thread Width
2.5 mm 4.0 mm