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NW40 Replacement Buna-N O-Ring
A: 0.21"
B: 1.60"

NW40 (KF40) Replacement Buna O'Ring
Fits NW40 Standard & Adaptive Centering Rings

Buna-N O-Ring:
• 100°C Maximum

NW40 High Vacuum Flange Equivalents
KF40, KF-40, K150, NW-40, QF40, ISO-QF
Overstock Pricing!
NW40-150-OB Compare to: KG40B, 711024, 100313905, O-B326, K150-OB 100 degrees

NW40 Buna-N O-Ring

NW40-150-OB-OSPrice: $4.00Overstock: $0.75

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Click to enlarge
NW40 Replacement O-Rings

NW40 Centering Rings

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Click to enlarge
NW32 to NW40
Adaptive Centering Rings

All NW40 Hardware

**NW40 Flange Accessories Available Below**
NW40 Centering Rings
NW32 to NW40 Adaptive Centering Ring

NW40 Clamps, All Types
NW40 Plastic Caps

Buna-N O-Ring:
100°C Maximum

• Buna-N is low cost, but their maximum operating temperature of 100°C makes them unacceptable for many high temperature vacuum applications.

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.