HP Cluster Platform Hardware Kits v2010 Installation Manual page 10

Carefully retain all screws for reuse if the interconnect chassis is to be remounted
or if it is replaced. Use only the 6-32 x .375 in Phillips pan-head screws to attach
the retainer brackets to the chassis. Use of incorrect screws might damage internal
components.
8 Myrinet Interconnect Rack Kit Installation Guide