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Buna-N Mil-Spec O-rings

Buna-N (Nitrile) O-Rings Mil-Spec:

Buna-N O-Rings are the most common and the simplest types of seal with an excellent sealing property and durability. Recommended for use with crude oil, gasoline, propane, petroleum oils and water. It is used in engines, gearboxes and also can be found in anything from shower heads, garden hoses, pumps up to an aircraft. Nitrile O-Rings are used as a face to face gasket style seal or as a shaft seal, and allow both rotary and linear movement. O-Rings serves as a packing, or a toric joint, is a mechanical gasket.

Size not listed, special requirements or large quantities please click this link to Request a Price Quote.




Image Model+ Item Name Stock Price Quantity Discounts
-010 N70 Mil-Spec 70 Duro Low Temp Nitrile (NBR) B70010-MS

-010 N70 Mil-Spec 70 Duro Low Temp Nitrile (NBR)

O-ring Size: 1/4"ID X 3/8"OD X 1/16"CS Drawings: MS28775 Material: MIL-P-25732 QPL Listed Description - Nitrile Rubber - NBR - Buna-N...
1900
$0.12

Add:
Min:  100
Quantity Discounts
100-277$0.12
278-1,666$0.09
1,667+$0.06
-014 B90 AMS-P-5510 NBR 90 Duro O-Ring B90014-AMS-P-5510

-014 B90 AMS-P-5510 NBR 90 Duro O-Ring

1/2"ID X 5/8"OD X 1/16"CS AMS-P-5510, Aircraft Red Hydraulic Systems Buna-N O-Rings 90 Duro: exceptionally suited for high pressure...
0
$0.50

Add:
Min:  1000
Quantity Discounts
1000-4,999$0.50
5,000-19,999$0.38
20,000+$0.25
-121 B90 AMS-P-5510 NBR 90 Duro O-Ring B90121-AMS-P-5510

-121 B90 AMS-P-5510 NBR 90 Duro O-Ring

1-1/16"ID X 1-1/4"OD X 3/32"CS AMS-P-5510, Aircraft Red Hydraulic Systems Buna-N O-Rings 90 Duro: exceptionally suited for high...
0
$0.50

Add:
Min:  1000
Quantity Discounts
1000-4,999$0.50
5,000-19,999$0.38
20,000+$0.25


What are the most common O-ring compounds?

We stock O-Rings in over 20 different compounds and durometers the following six are the standard rubber materials in a range of durometers (Shore A) hardness to satisfy practically any service condition:

Buna-N O-Rings / Nitrile O-Rings / NBR: Nitrile (Buna-N) is the most widely used elastomer due to its excellent resistance to petroleum products, operating temperature range (-40°F to +257°F) and one of the best performance-to-cost values. It's an ideal material for aerospace, automotive, propane and natural gas applications. Special Hydrogenated Nitrile (HNBR) compounds can improve resistance to direct ozone, sunlight, and weather exposure while increasing temperature range to +300°F.
AS-568 Buna-N O-Rings | Metric Buna-N O-Rings

Viton® O-Rings / FKM: Fluorocarbon (Viton®) exhibits exceptional resistance to chemicals, oils, temperature extremes (-13°F to +446°F), low compression set, low gas permeability and excellent aging characteristics. Applications include: aircraft engines, automotive fuel handling systems, and chemical processing industries. FKM is also suitable for high vacuum applications. It is not recommended for exposure to ketones, alkalis, and Skydrol® fluids. Custom compounds are available with improved chemical and low temperature resistance.
AS-568 Viton® O-Rings | Metric Viton® O-Rings

Ethylene-Propylene / EPDM O-Rings: EPDM has outstanding resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight (-40ºF to +275ºF); but it is not recommended for gasoline, petroleum oil and grease, and hydrocarbon environments. This popular rubber compound is usually the first choice for low torque drive belt applications.
AS-568 EPDM O-Rings | Metric EPDM O-Rings

Silicone O-Rings / VMQ: In the Silicone family, you will find compounds which are superior as static seals in extreme temperature conditions. Standard compounds handle operating temperatures -85º to +400ºF. Silicone compounds are popular in food and medical applications because they are very clean and do not impart odor or taste. Special Phenyl silicones can be used down to -148°F.
AS-568 Silicone O-Rings | Metric Silicone O-Rings

Neoprene® O-Rings / CR: Neoprene (-40º to +250ºF) is reasonably priced and features good resistance to petroleum oils, ozone, sunlight and oxygen aging, relatively low compression set, good resilience and outstanding physical toughness. It is the preferred sealing material for the refrigeration industry because of its resistance to ammonia and Freon®.
AS-568 Neoprene® O-Rings