HP Compaq NC6140 Maintenance And Service Manual page 184

Screw Listing
mm
Where used:
Two screws that secure the hard drive cover and connector to the hard drive
(documented in
Phillips PM2.0×4.0 Screw Locations
C–2
Phillips PM2.0×4.0 Screw
Color
Black
Section 6.4)
Table C-1
Qty. Length
7 4.0 mm
Maintenance and Service Guide
Head
Thread Width
2.0 mm 4.0 mm