IBM Thinkpad T40 Hardware Maintenance Manual page 141

Step Screw (quantity)
4
M2 × 4 mm, bind-head,
nylon-coated (1)
When installing: Make sure that the connector 1 is
ThinkPad T40/T40p, T41/T41p, T42/T42p Series
firmly attached.
Removing and replacing a FRU
Color
Black
4
6
5
Torque
0.245 Nm
(2.5 kgfcm)
135