For X20, X21; For X22 - 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

Step Screw (quantity)
1 M2 × 3.5mm,
Nylock-coated (3) BK
1a M2 × 6mm, Nylock-coated
(5) BK
1
3
Chapter 3. ThinkPad X20, X21, X22
Torque
19.6 Ncm (2 kgfcm)
1a
1a
Torque
19.6 Ncm (2 kgfcm)
19.6 Ncm (2 kgfcm)
2
75