Lenovo ThinkPad T490s Hardware Maintenance Manual page 89

Removal steps of trackpad (for NFC models)
Table 11. Screw specification (ThinkPad T490s)
Step Screw (quantity)
7
M2 × 2 mm, flat-head, nylon-coated (4)
Table 12. Screw specification (ThinkPad X390)
Step Screw (quantity)
7
M2 × 1.8 mm, flat-head, nylon-coated (4)
Color Torque
Black 0.181 Nm
(1.85 kgf-cm)
Color Torque
Silver 0.181 Nm
(1.85 kgf-cm)
.
Chapter 8 Removing or replacing a FRU
83