HP Compaq nc6220 Maintenance And Service Manual page 190

Screw Listing
mm
Where used:
One screw that secures the memory module compartment cover to the
computer (screw is secured to the cover by a C clip; documented in
Phillips PM1.5×4.0 Screw Location
C–4
Phillips 1.5×4.0 Screw (Continued)
Color
Black
Table C-1
Qty. Length
5 4.0 mm
Maintenance and Service Guide
Head
Thread Width
1.5 mm 4.5 mm
Section 6.8)