Click to enlargeNW40 Centering Ring
Aluminum/Viton O-Ring
A: 1.57"
B: 0.21"

• Viton (Fluorocarbon, FKM) O-Ring
• 200°C Maximum
• NW40 (KF40) High Vacuum Hardware

NW40 (KF40) Aluminum Centering Ring Assembly With Viton (Fluorocarbon, FKM) O-Ring


Fits NW40 (KF40) Flange OD: Ø2.18"
• NW40 Flange Centering Ring Counter Bore: 1.62"

NW40 High Vacuum Flange Equivalents
KF40, KF-40, K150, NW-40, QF40, ISO-QF
NW40-150-AR-V Compare to: KC40AV 710015 100312605 QF40-150-AR-V QF40-150-ARV K150-CRA NW40-AR-V QF40-150-CTR-AL-VT

NW40 Centering Ring

NW40-150-AR-V-OSPrice: $13.95Overstock: $6.00

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All NW40 Hardware

NW40 Clamps, All Types

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NW40 O-Rings (All)

NW40 Ring and Clamp Assembly

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Centering Rings WITHOUT O-Ring

NW40 Mesh Screened Centering Rings

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NW Overpressure Ring

Contact LDS Vacuum with any questions:
Phone (407)862-4643 via Fax (407)862-8723 or

LDS Vacuum Products is a 100% woman owned company and
certified Woman Owned Small Business (WOSB)
The logos and/or trademarks appearing on this page are not owned by or registered to LDS but, rather, designate products sold by LDS, and are owned and/or registered to the manufacturers or suppliers of the products.
Viton® is a registered trademark of DuPont Dow Elastomers