IBM H Series Installation And Service Manual page 264

6. Attach the rear of the CPU Drawer to the rack rails with the two M4 screws and
the two M4 washers provided with the CPU Drawer. This secures the drawer to
the rack.
7. Using four M5 x 14 hex head screws supplied with this unit, attach the disk drive
drawer to the two nut clips and the rails in the front of the rack at the sides.
8. Replace the parts that you removed earlier:
Rear top cover
Front top cover
Both blowers
All Hot-Swappable disk drives
Front DASD cover
Both power supplies
7-10
RS/6000 Enterprise Server Model H Series Installation and Service Guide
Rear of Rack
Hex Flange Screws
and Flat Washers