H123545: 2635 CD-ROM OPTION INSTALLATION WARNING TEXT: A small number of CD-ROM options P/N 73H9795 have mounting screws that may interfere with the drive's sliding tray. Do NOT install the black 3.5mm long mounting screws. The correct size are gold colored M2 x 2.4mm pan head screws. If you do not have this size screw order Screw Kit P/N83H6522. This Kit contains the 4 M2 x 2.4mm screws needed to install the CD-ROM and various other size screws. In the US, P/N 73H9755 containing only 4 M2 x 2.4 gold screws may be ordered from the IBM PCCO HELP CENTER by calling 1-800-772-2227. NOTE: this part number is not a FRU and can not be ordered directly from Mechanicsburg.