IBM ThinkPad T40 series Hardware Maintenance Manual page 111

Step Screw (quantity)
4
M2 × 4 mm, bind-head,
nylon-coated (1)
ThinkPad T40, T40p, T41 Series
Removing and replacing a FRU
Color
Black
4
6
5
Torque
0.245 Nm
(2.5 kgfcm)
107