IBM THINKPAD S05L-1270-01 - Manual (Page 512)

Step Size (quantity) Torque
1 M2.5 x 6 mm (2) 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.
500 IBM Mobile Systems HMM