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-300 Series - 3/16" CS - 0.210" 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+
AS568-336 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70336

AS568-336 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

2-7/8"ID X 3-1/4"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
348
$0.30

Add:
Min:  3
Quantity Discounts
3-155$0.30
156-999$0.23
1,000+$0.15
AS568-337 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70337

AS568-337 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

3"ID X 3-3/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
19
$0.34

Add:
Min:  3
Quantity Discounts
3-137$0.34
138-882$0.26
883+$0.17
AS568-312 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70312

AS568-312 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5/8"ID X 1"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
1112
$0.08

Add:
Min:  10
Quantity Discounts
10-583$0.08
584-3,749$0.06
3,750+$0.04
AS568-310 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70310

AS568-310 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1/2"ID X 7/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
2503
$0.06

Add:
Min:  13
Quantity Discounts
13-777$0.06
778-4,999$0.05
5,000+$0.03
AS568-309 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70309

AS568-309 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

7/16"ID X 13/16"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
122
$0.06

Add:
Min:  13
Quantity Discounts
13-777$0.06
778-4,999$0.05
5,000+$0.03
AS568-334 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70334

AS568-334 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

2-5/8"ID X 3"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
1162
$0.29

Add:
Min:  3
Quantity Discounts
3-160$0.29
161-1,034$0.22
1,035+$0.15
AS568-343 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70343

AS568-343 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

3-3/4"ID X 4-1/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
282
$0.39

Add:
Min:  2
Quantity Discounts
2-119$0.39
120-769$0.29
770+$0.20
AS568-342 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70342

AS568-342 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

3-5/8"ID X 4"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
0
$0.37

Add:
Min:  2
Quantity Discounts
2-126$0.37
127-810$0.28
811+$0.19
AS568-340 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70340

AS568-340 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

3-3/8"ID X 3-3/4"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
880
$0.36

Add:
Min:  2
Quantity Discounts
2-129$0.36
130-833$0.27
834+$0.18
AS568-339 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70339

AS568-339 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

3-1/4"ID X 3-5/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
900
$0.36

Add:
Min:  3
Quantity Discounts
3-129$0.36
130-833$0.27
834+$0.18
AS568-338 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70338

AS568-338 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

3-1/8"ID X 3-1/2"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
3365
$0.34

Add:
Min:  3
Quantity Discounts
3-137$0.34
138-882$0.26
883+$0.17
AS568-357 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70357

AS568-357 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5-1/2"ID X 5-7/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
68
$0.68

Add:
Min:  2
Quantity Discounts
2-68$0.68
69-441$0.51
442+$0.34
AS568-358 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70358

AS568-358 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5-5/8"ID X 6"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
31
$0.71

Add:
Min:  2
Quantity Discounts
2-65$0.71
66-422$0.53
423+$0.36
AS568-359 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70359

AS568-359 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5-3/4"ID X 6-1/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$0.74

Add:
Min:  2
Quantity Discounts
2-63$0.74
64-405$0.56
406+$0.37
AS568-360 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70360

AS568-360 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

5-7/8"ID X 6-1/4"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
453
$0.78

Add:
Min:  2
Quantity Discounts
2-59$0.78
60-384$0.59
385+$0.39
AS568-362 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70362

AS568-362 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

6-1/4"ID X 6-5/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
130
$0.84

Add:
Min:  2
Quantity Discounts
2-55$0.84
56-357$0.63
358+$0.42
AS568-363 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70363

AS568-363 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

6-1/2"ID X 6-7/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
107
$0.88

Add:

Quantity Discounts
1-53$0.88
54-340$0.66
341+$0.44
AS568-364 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70364

AS568-364 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

6-3/4"ID X 7-1/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
3
$0.92

Add:

Quantity Discounts
1-50$0.92
51-326$0.69
327+$0.46
AS568-313 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70313

AS568-313 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

11/16"ID X 1-1/16"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
1112
$0.08

Add:
Min:  9
Quantity Discounts
9-583$0.08
584-3,749$0.06
3,750+$0.04
AS568-317 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70317

AS568-317 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

15/16"ID X 1-5/16"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
3806
$0.11

Add:
Min:  8
Quantity Discounts
8-424$0.11
425-2,727$0.08
2,728+$0.06