HP Compaq nc8430 Maintenance And Service Manual page 196

Screw Listing
mm
Where used:
2 screws that secure the modem module to the computer (documented in
Section 5.20)
Phillips PM2.5×4.0 Screw Locations
A–20
Table A-12
Phillips PM2.5×4.0 Screw
Color Qty.
Black 2
Length Thread
4.0 mm 2.5 mm
Maintenance and Service Guide
Head
Width
5.0 mm