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-400 Series -1/4" CS - 0.275" CS

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
AS568-420 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70420

AS568-420 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

3-7/8"ID X 4-3/8"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$2.50

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Quantity Discounts
1-18$2.50
19-119$1.88
120+$1.25
AS568-421 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70421

AS568-421 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

4"ID X 4-1/2"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
44
$2.50

Add:

Quantity Discounts
1-18$2.50
19-119$1.88
120+$1.25
AS568-422 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70422

AS568-422 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

4-1/8"ID X 4-5/8"OD X 1/4"CS   Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile,...
86
$2.50

Add:

Quantity Discounts
1-18$2.50
19-119$1.88
120+$1.25
AS568-423 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70423

AS568-423 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

4-1/4"ID X 4-3/4"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
300
$2.50

Add:

Quantity Discounts
1-18$2.50
19-119$1.88
120+$1.25
AS568-424 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70424

AS568-424 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

4-3/8"ID X 4-7/8"OD X 1/4"CS Buna-N O-Rings 70 Duro: Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing...
66
$2.50

Add:

Quantity Discounts
1-18$2.50
19-119$1.88
120+$1.25
AS568-425 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70425

AS568-425 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

4 1/2"ID X 5"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
27
$0.73

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Quantity Discounts
1-63$0.73
64-410$0.55
411+$0.37
AS568-426 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70426

AS568-426 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

4 5/8"ID X 5 1/8"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
142
$0.75

Add:

Quantity Discounts
1-62$0.75
63-399$0.56
400+$0.38
AS568-427 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70427

AS568-427 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

4 3/4"ID X 5 1/4"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
162
$0.78

Add:

Quantity Discounts
1-59$0.78
60-384$0.59
385+$0.39
AS568-428 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70428

AS568-428 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

4 7/8"ID X 5 3/8"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
49
$0.79

Add:

Quantity Discounts
1-59$0.79
60-379$0.59
380+$0.40
AS568-429 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70429

AS568-429 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5"ID X 5 1/2"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
760
$0.81

Add:

Quantity Discounts
1-57$0.81
58-370$0.61
371+$0.41
AS568-430 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70430

AS568-430 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5 1/8"ID X 5 5/8"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
43
$0.84

Add:

Quantity Discounts
1-55$0.84
56-357$0.63
358+$0.42
AS568-431 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70431

AS568-431 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5 1/4"ID X 5 3/4"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
285
$0.85

Add:

Quantity Discounts
1-54$0.85
55-352$0.64
353+$0.43
AS568-432 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70432

AS568-432 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5 3/8"ID X 5 7/8"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
19
$0.87

Add:

Quantity Discounts
1-53$0.87
54-344$0.65
345+$0.44
AS568-433 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70433

AS568-433 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5 1/2"ID X 6"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
618
$0.90

Add:

Quantity Discounts
1-51$0.90
52-333$0.68
334+$0.45
AS568-434 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70434

AS568-434 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5 5/8"ID X 6 1/8"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
455
$0.92

Add:

Quantity Discounts
1-50$0.92
51-326$0.69
327+$0.46
AS568-435 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70435

AS568-435 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5 3/4"ID X 6 1/4"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
50
$0.94

Add:

Quantity Discounts
1-49$0.94
50-319$0.71
320+$0.47
AS568-436 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70436

AS568-436 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5 7/8"ID X 6 3/8"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
37
$0.96

Add:

Quantity Discounts
1-48$0.96
49-312$0.72
313+$0.48
AS568-437 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70437

AS568-437 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

6"ID X 6 1/2"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
40
$0.97

Add:

Quantity Discounts
1-48$0.97
49-309$0.73
310+$0.49
AS568-438 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70438

AS568-438 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

6 1/4"ID X 6 3/4"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
421
$1.00

Add:

Quantity Discounts
1-46$1.00
47-299$0.75
300+$0.50
AS568-439 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70439

AS568-439 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

6 1/2"ID X 7"OD X 1/4"CS Buna-N O-Rings 70 Duro: Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products....
11
$1.07

Add:

Quantity Discounts
1-43$1.07
44-280$0.80
281+$0.54