IBM THINKPAD S05L-1270-01 - Manual (Page 79)

Step Size (Quantity) Torque
4 M 2.6 x 2.8mm, Red screw (3) 4 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.
ThinkPad 380, 385 (2635) 67