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

NW40-150-OB10
NW40 (KF40) Replacement Buna O'Ring
Fits NW40 Standard & Adaptive Centering Rings
Pack of 10 NW40-150-OB Buna-N O-Rings

Buna-N O-Ring:
• 100°C Maximum
Also Known As Nitrile (NBR)
• NW40 (KF40) Replacement Elastomer Seals

NW40 High Vacuum Flange Equivalents
KF40, KF-40, K150, NW-40, QF40, ISO-QF


NW40 Buna-N O-Rings
(NW40-150-OB10)

NW40-150-OB10Price: $40.50Sale: $9.00

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NW40 O-Rings (All)


NW40 Centering Rings


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NW40 to NW32 Adaptive 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
info@ldsvacuum.com

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.