Agilent Technologies TwisTorr 74 FS Notice De Mode D'emploi page 340

17 Technical Information
Connection of the High Vacuum Flange
Figure 48 II Installation for CFF 4,5"
The screws must be inserted from the top flange while nuts must be fixed below
CAUTION!
the flange.
340/352 TwisTorr 74 FS User Manual / 87-901-053-01 (A.00)