Lenovo ThinkPad T420 2620 Hardware Maintenance Manual page 132

Table 37. Removal steps of wireless LAN antenna assembly or wireless LAN/WAN antenna assembly (continued)
Step Screw (quantity)
3
M2 × 3 mm, flat-head, nylon-coated (2)
126
ThinkPad T420 and T420i Hardware Maintenance Manual
Color Torque
Black 0.181 Nm
(1.85 kgfcm)