HP A7340-96002 manual Installing the Tinnerman Clips HP Rack
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Figure 4. Installing the Tinnerman Clips (HP Rack)
–For a Compaq/Rittal rack, install (2) #10-32 square Tinnerman nuts for each of the front columns of the rack in the top and bottom positions of the three-hole EIA pattern. Also install (1) spacer in the center position for each column on the front of the rack. See Figure 5.
Figure 5. Installing the Tinnerman Nuts and Spacers (Compaq/Rittal Rack)