HP Compaq NC6140 Maintenance And Service Manual page 204

Screw Listing
mm
Where used:
1
Two screw locks that secure the system board to the computer (documented
in Section 6.25)
2
Two screw locks that secure the system board to the computer (documented
in Section 6.25)
Hex Socket HM5.0×9.0 Screw Lock Locations
C–22
Table C-12
Hex Socket HM5.0×9.0 Screw Lock
Color
Silver
Qty. Length
6 9.0 mm
Maintenance and Service Guide
Head
Thread Width
5.0 mm 5.0 mm