Buna-N O-Ring
• 100°C Maximum

Change Your Flange Size With One Centering Ring!

The use of Adapter Centering Rings is simple:
One side of the ring is NW32 and the other NW40.
By using this centering, you CONVERT a
NW32 flange size to a NW40 Flange

NW, KF, QF Series High Vacuum Flanges

NW32 (KF32) OD: 2.18" Centering Ring Counter Bore: 1.34"

NW40 (KF40) OD: 2.18" Centering Ring Counter Bore: 1.62"

NW32 Flanges Are Sometimes Used Overseas (Uncommon)

NW32 (KF32) vacuum flange size is not popular in the US,
but may be necessary to use US flanges.
NW40-32-AAR-B Compare to: 100315805 KCA3240AB

Aluminum Adaptive Centering Ring
NW32 to NW40
(NW32-40-AAR-B)
NW32-40-AAR-B$12.00