Lenovo ThinkPad T420 2620 Hardware Maintenance Manual page 108

Table 27. Removal steps of fan assembly (continued)
For Integreted Graphics models:
Step Screw (quantity)
1
Capture shoulder screw (4)
2
M2 × 3 mm, wafer-head, nylon-coated (1)
102
ThinkPad T420 and T420i Hardware Maintenance Manual
Color Torque
Silver 0.181 Nm
(1.85 kgfcm)
black 0.181 Nm
(1.85 kgfcm)