Screw Specifications; M2 X; Go To Https://Support.lenovo.com/Partslookup - Lenovo Yoga C640-13IML Hardware Maintenance Manual

Figure 14. Disconnect the battery cable
Step 2. Disconnect the wireless antenna cables from the WLAN card. Then, remove one screw. Next, slide
the WLAN card out of the slot.
Figure 15. Disconnect the wireless antenna cables, remove one screw and slide the WLAN card out of the slot
Callout number
3
Go to
https://support.lenovo.com/partslookup
part:
WLAN card

Screw specifications

M2 x 2

to look up the Lenovo part number of the following replacement
Number of screws
1
.
Chapter 4 Removing a FRU or CRU
35