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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+
AS568-425 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...
143
$0.75

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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...
178
$0.78

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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...
50
$0.79

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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...
794
$0.81

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Quantity Discounts
1-57$0.81
58-370$0.61
371+$0.41
AS568-445 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70445

AS568-445 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

8"ID X 8 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...
269
$1.38

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Quantity Discounts
1-33$1.38
34-217$1.04
218+$0.69
AS568-446 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70446

AS568-446 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

8 1/2"ID X 9"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
12
$1.52

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Quantity Discounts
1-30$1.52
31-197$1.14
198+$0.76
AS568-447 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70447

AS568-447 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

9"ID X 9 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...
33
$1.54

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Quantity Discounts
1-30$1.54
31-194$1.16
195+$0.77
AS568-449 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70449

AS568-449 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

10"ID X 10 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...
120
$1.78

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Quantity Discounts
1-26$1.78
27-168$1.34
169+$0.89
AS568-450 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70450

AS568-450 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

10 1/2"ID X 11"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
20
$2.28

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Quantity Discounts
1-20$2.28
21-131$1.71
132+$1.14
AS568-451 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70451

AS568-451 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

11"ID X 11 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...
17
$2.37

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Quantity Discounts
1-19$2.37
20-126$1.78
127+$1.19
AS568-452 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70452

AS568-452 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

11 1/2"ID X 12"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
11
$2.47

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Quantity Discounts
1-18$2.47
19-121$1.85
122+$1.24
AS568-453 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70453

AS568-453 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

12"ID X 12 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...
36
$2.57

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Quantity Discounts
1-18$2.57
19-116$1.93
117+$1.29
AS568-454 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70454

AS568-454 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

12 1/2"ID X 13"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
10
$2.67

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Quantity Discounts
1-17$2.67
18-112$2.00
113+$1.34
AS568-455 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70455

AS568-455 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

13"ID X 13 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...
19
$2.76

Add:

Quantity Discounts
1-16$2.76
17-108$2.07
109+$1.38
AS568-456 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70456

AS568-456 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

13 1/2"ID X 14"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
9
$2.88

Add:

Quantity Discounts
1-16$2.88
17-104$2.16
105+$1.44
AS568-457 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70457

AS568-457 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

14"ID X 14 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...
35
$2.93

Add:

Quantity Discounts
1-15$2.93
16-102$2.20
103+$1.47
AS568-458 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70458

AS568-458 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

14 1/2"ID X 15"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
0
$2.96

Add:

Quantity Discounts
1-15$2.96
16-101$2.22
102+$1.48
AS568-459 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70459

AS568-459 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

15"ID X 15 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...
3
$3.26

Add:

Quantity Discounts
1-14$3.26
15-92$2.45
93+$1.63
AS568-460 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70460

AS568-460 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

15 1/2"ID X 16"OD X 1/4"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
33
$3.76

Add:

Quantity Discounts
1-12$3.76
13-79$2.82
80+$1.88