IBM 9306 Hardware Maintenance Manual page 80

6. Loosely insert one M5 screw 1 into each rail.
Statement 5
≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs)
CAUTION:
Use safe practices when lifting.
7. Slide the expansion unit into the rack, and insert the M6 screws 1 . Do not
overtighten the M6 1 screws.
8. Tighten the rear screws 2 .
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Hardware Maintenance Manual: IBM PC Server/Enterprise Racks Types 9306, 9308