IBM ThinkPad R30 Hardware Maintenance Manual page 126

Step Size (Quantity)
2 M2 x L6 (3)
Note: Before removing and replacing the PCMCIA holder,
make sure that the PCMCIA cards are removed and
the eject levers are sticking out.
120
ThinkPad R30/R31 HMM
1
2
3
4
Color
Silver
Torque
1.6 kgf-cm