Lenovo T420 - Manual (Page 117)

Removal steps of mSATA solid state drive
1
Step Screw (quantity) Color Torque
1 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm
(1.85 kgfcm)
2
Chapter 8 . Removing and replacing a FRU 111