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-900 Series - Boss

A general purpose, sulfur-cured Buna-N Nitrile O-Ring, the most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. More than 50% of the Orings sold are Buna-N Nitrile Orings, commonly used in hydraulic/pneumatic motors, cylinders, pumps and valves.

Operating temperature: -40° to +250°F




Image Model+ Item Name Stock Price Quantity Discounts
901 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70901

901 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 3/32" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
11373
$0.03

Add:
Min:  17
Quantity Discounts
17-1,749$0.03
1,750-14,999$0.02
15,000+$0.01
902 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70902

902 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 1/8" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is...
9847
$0.03

Add:
Min:  17
Quantity Discounts
17-1,749$0.03
1,750-14,999$0.02
15,000+$0.01
903 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70903

903 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 3/16" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
7979
$0.03

Add:
Min:  17
Quantity Discounts
17-1,749$0.03
1,750-14,999$0.02
15,000+$0.01
904 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70904

904 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 1/4" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is...
5264
$0.03

Add:
Min:  17
Quantity Discounts
17-1,749$0.03
1,750-14,999$0.02
15,000+$0.01
905 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70905

905 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 5/16" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
6673
$0.03

Add:
Min:  17
Quantity Discounts
17-1,749$0.03
1,750-14,999$0.02
15,000+$0.01
906 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70906

906 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 3/8" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is...
1390
$0.03

Add:
Min:  17
Quantity Discounts
17-1,749$0.03
1,750-14,999$0.02
15,000+$0.01
907 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70907

907 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 7/16" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
4024
$0.04

Add:
Min:  13
Quantity Discounts
13-1,166$0.04
1,167-7,499$0.03
7,500+$0.02
908 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70908

908 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 1/2" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is...
2327
$0.04

Add:
Min:  13
Quantity Discounts
13-1,166$0.04
1,167-7,499$0.03
7,500+$0.02
909 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70909

909 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 9/16" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
2146
$0.05

Add:
Min:  10
Quantity Discounts
10-933$0.05
934-5,999$0.04
6,000+$0.03
910 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70910

910 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 5/8" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is...
4765
$0.06

Add:
Min:  9
Quantity Discounts
9-777$0.06
778-4,999$0.05
5,000+$0.03
911 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70911

911 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 11/16" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
1397
$0.08

Add:
Min:  7
Quantity Discounts
7-583$0.08
584-3,749$0.06
3,750+$0.04
912 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70912

912 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 3/4" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is...
1867
$0.10

Add:
Min:  5
Quantity Discounts
5-466$0.10
467-2,999$0.08
3,000+$0.05
913 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70913

913 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 13/16" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
787
$0.11

Add:
Min:  5
Quantity Discounts
5-424$0.11
425-2,727$0.08
2,728+$0.06
914 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70914

914 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 7/8" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is...
987
$0.12

Add:
Min:  5
Quantity Discounts
5-388$0.12
389-2,499$0.09
2,500+$0.06
916 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70916

916 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 1" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a...
488
$0.13

Add:
Min:  4
Quantity Discounts
4-358$0.13
359-2,307$0.10
2,308+$0.07
918 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70918

918 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 1 1/8" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
1627
$0.14

Add:
Min:  4
Quantity Discounts
4-333$0.14
334-2,142$0.11
2,143+$0.07
920 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70920

920 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 1 1/4" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
1068
$0.15

Add:
Min:  4
Quantity Discounts
4-311$0.15
312-1,999$0.11
2,000+$0.08
924 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70924

924 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 1 1/2" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
651
$0.16

Add:
Min:  4
Quantity Discounts
4-291$0.16
292-1,874$0.12
1,875+$0.08
928 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70928

928 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 1 3/4" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR,...
664
$0.19

Add:
Min:  3
Quantity Discounts
3-245$0.19
246-1,578$0.14
1,579+$0.10
932 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70932

932 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

Tube Size OD: 2" Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a...
464
$0.25

Add:
Min:  2
Quantity Discounts
2-186$0.25
187-1,199$0.19
1,200+$0.13


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