IBM THINKPAD S05L-1270-01 - Manual (Page 488)

Step Size (quantity) Torque
3 M2.5 x 4 mm, Nylon (2) 4 kgcm
4 M2 x 4 mm (2) 2.5 kgcm
5 M2.6 x 5 mm (1) 3 kgcm
Note: Make sure you use the correct screw and tighten the
screw to the torque specified. Do not use the screw that you
removed, use a new screw.
476 IBM Mobile Systems HMM