HP TC4400 - Manual (Page 174)

A–16 Maintenance and Service Guide
Screw Listing
Torx8 T8M2.0×8.0 Screw Locations
Table A-7
Torx8 T8M2.0×8.0 Screw
Color Qty. Length Thread
Head
Width
Silver 7 8.0 mm 2.0 mm 4.5 mm
Where used:
3 screws that secure the fan to the tablet PC (documented in Section 5.10 )
mm