Click to enlarge

NW40 Centering Ring
304 Stainless/Buna O-Ring
A: 1.57"
B: 0.21"

• Buna-N O-Ring
• 100°C Maximum
• NW40 (KF40) High Vacuum Hardware
NW40 Stainless Centering Ring with Buna O-Ring
Fits: NW40 (KF40) Flange

Fits NW40 Flange Series Equivalents:
KF40, KF-40, NW-40 & QF40
NW40-150-SR-BCompare to: QF40-150-SRB QF40-150-SR-B 710006 100312805 KC40SB K150-CRB NW-40-CR-SB P101962 4000012

NW40 Centering Ring (NW40-150-SR-B)
NW40-150-SR-BPrice: $12.00Sale: $6.00

Click to enlarge
Click to enlarge
All NW40 Hardware

NW40 Clamps, All Types

Click to enlarge
Click to enlarge
NW40 Ring and Clamp Assembly

NW40 O-Ring Replacements

Click to enlarge
Click to enlarge
Centering Rings WITHOUT O-Ring

NW40 Mesh Screened Centering Rings

Click to enlarge
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.

There is a global helium shortage. Each time an MRI is performed, helium is used. Please rethink your helium balloon purchase.