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Buna-N (Nitrile) NBR O-Rings

Common Names: NBR (acrylonitrile butadiene rubber), Buna-N, Nitrile.

Trade Names: CHEMIGUM®, HYCAR®, PARACRIL® , PERBUNAN®, KRYNAC®, NYSYSN®

General Description:

Most commonly used general purpose molded o-ring material due to relative low cost, good mechanical properties, and basic resistance to many common lubricants.  Specific physical and chemical resistances vary by compound formulation.  Basic NBR is not resistant to weathering and ozone without special formulation.  Hydrogenated versions of NBR (HNBR) are more resistant to temperature, chemicals, and ozone. 

* Buna-N is available in a wide range of Durometers and Colors,
   as well as many compound variations designed to meet specific applications.

Features: 

 

Limitations:

 Temperature resistance:

 

Popular Buna-N (Nitrile) O-Ring Materials

Don't see what you need? 
Please contact an application engineer for assistance in selecting the compound that provides the best combination of performance and price for your specific application. 

Marco CPD# Base Material Color Duro (Shore A) Relative Price Typical Inventory Level High Temp (F) Low Temp (F) Steam < 300 F Steam < 400 F Compression Set Chemical & Solvents Sunliight, Ozone, UV Wear Abrasion Permeation Vacuum Petroleum Oils & Hydraulics Fuels & Gas Brake Fluids
1 = Great    2 = Good    3 = Fair    4 = Poor
B1000  BUNA-N (NBR) NITRILE  Black  70  $ Very High 250 -30 2 2
Lowest cost highest inventory general purpose commodity NBR compound  (available in nearly any color and durometer)
B1001  BUNA-N (NBR) NITRILE  Black  90  $$ High 250 -30 2 2 2
General purpose NBR, higher pressure applications
B1002  BUNA-N (NBR) NITRILE  Black  70  $$ Med 250 -30 2 2
FDA Compliant NBR per 21 CFR 177.2600 for food contact and some medical uses
B1006  BUNA-N (NBR) NITRILE  Black  50  $$ Med 250 -30 2 2
General purpose softer than standard NBR to help seal rough or warped glands and or lower closure force applications
B1030  BUNA-N (NBR) NITRILE  Black  70  $$ Med 275 -65  2 2
Higher performance NBR, Improved lower and higher temperature resistance and oil resistance at higher temperature than standard NBR.  Similar to Parker N0794-75 and M83461
B1105 BUNA-N (NBR) NITRILE  Black  70  $$$$ Low 250 -30 3 2 2 2
Metal detectable NBR for contamination detection sensors, FDA Compliant per 21 CFR 177.2600 for food contact and some Life Sci uses (additional colors available)
M1000  BUNA-N (NBR) NITRILE  Black  70  $$$ Med 275 -65  2 1
Military Specification Mil-Spec AMS-P-25732 , formerly MS28775-### per Mil-P-25732C-(1)
M1001  BUNA-N (NBR) NITRILE  Black  75 $$$ High 275 -65  2 1
Military Specification Mil-Spec AMS-P-83461 Formerly M83461/1-### per MIL-P-83461B#3, improved low temp and hydraulic fluid resistance

* Buna-N is available in a wide range of Durometers and Colors,
   as well as many compound variations designed to meet specific applications.

Don't see what you need? 
Please contact an application engineer for assistance in selecting the compound that provides the best combination of performance and price for your specific application. 

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1-800-775-6525  Fax: 978-688-6915
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