IBM ThinkPad R30 Hardware Maintenance Manual page 185

Step Size (Quantity)
2 M2.5 x L5(3)
Notes:
1. When removing the system board from the bottom
cover, gently raise the side of the system board facing
the rear I/O ports; then pull out the system board.
2
Color
Silver
MT 2656, 2657, 2676
1
Torque
2.5 kgf-cm
179