IBM 1 U Installation Manual page 15

5.
Install both slide-rail assemblies in the rack cabinet:
a. Install ten clip nuts or ten cage nuts as required for your rack cabinet
(clip nuts for round-hole mounting flanges; cage nuts for square-hole
mounting flanges). Use the cage-nut-insertion tool or a flat-blade
screwdriver to install cage nuts.
b. Align the slide rails to the rack-mounting flanges (front and rear). If it is
necessary to adjust the length of the slide rails, loosen the nuts on the
rear of the rails; then, tighten the nuts.
c. Insert and tighten eight M5 screws to secure both slide-rail assemblies to
the rack cabinet.
Note: Use the top and bottom mounting holes to attach the slide-rail
assemblies to the rack-mounting flanges. The center mounting holes on
the front of the rack are used to secure the tape enclosure to the rack.
Cage
nuts
Front Rear
Chapter 2. Installing the tape enclosure
7