HP Compaq nc6220 Maintenance And Service Manual page 202

Screw Listing
mm
Where used:
One screw that secures the TPM security module to the computer
(documented in
Phillips 1.5×3.0 Screw Location
C–16
Phillips 1.5×3.0 Screw
Color
Black
Section 6.12)
Table C-8
Qty. Length
1 3.0 mm
Maintenance and Service Guide
Head
Thread Width
1.5 mm 2.25 mm