For X20, X21 - IBM ThinkPad X20 Hardware Maintenance Manual

Case Keyboard deck up; then remove it
Step Screw (quantity)
2 M2 × 6mm, Nylock-coated
(4) BK
For X22, X23, X24
Step Screw (quantity)
1 M2 × 3.5mm,
Nylock-coated (3) BK
1a M2 × 6mm, Nylock-coated
(5) BK
80
ThinkPad X20, X21, X22, X23, X24
3
4
1
2
Torque
19.6 Ncm (2 kgfcm)
1a
1a
Torque
19.6 Ncm (2 kgfcm)
19.6 Ncm (2 kgfcm)