HP ZE4900 - Manual (Page 174)

C–18 Maintenance and Service Guide
Screw Listing
HM5.0×9.0 Screwlock Locations - HP Compaq nx9040 Notebook
Models
Table C-9
HM5.0×9.0 Screwlock
Color Qty. Length Thread
Head
Width
Silver 8 9.0 mm 2.5 mm 5.0 mm
Where used:
6 screwlocks that secure the system board to the notebook (documented
in
Section 5.19 , HP Compaq nx9040 notebook models only)
mm