IBM X23 - Manual (Page 85)

2
3
Case Keyboard deck up; then remove it
Step Screw (quantity) Torque
2 M2 × 6mm, Nylock-coated
(4) BK
19.6 Ncm (2 kgfcm)
Chapter 3. ThinkPad X20, X21, X22, X23, X24 81