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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
AS568-309 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...
109
$0.06

Add:
Min:  13
Quantity Discounts
13-777$0.06
778-4,999$0.05
5,000+$0.03
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...
1683
$0.06

Add:
Min:  13
Quantity Discounts
13-777$0.06
778-4,999$0.05
5,000+$0.03
AS568-311 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70311

AS568-311 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

9/16"ID X 15/16"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
3735
$0.07

Add:
Min:  10
Quantity Discounts
10-666$0.07
667-4,285$0.05
4,286+$0.04
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...
-30
$0.08

Add:
Min:  10
Quantity Discounts
10-583$0.08
584-3,749$0.06
3,750+$0.04
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...
1084
$0.08

Add:
Min:  9
Quantity Discounts
9-583$0.08
584-3,749$0.06
3,750+$0.04
AS568-314 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70314

AS568-314 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

3/4"ID X 1-1/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
6015
$0.09

Add:
Min:  9
Quantity Discounts
9-518$0.09
519-3,333$0.07
3,334+$0.05
AS568-315 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70315

AS568-315 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

13/16"ID X 1-3/16"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
1260
$0.09

Add:
Min:  9
Quantity Discounts
9-518$0.09
519-3,333$0.07
3,334+$0.05
AS568-316 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70316

AS568-316 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

7/8"ID X 1-1/4"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
619
$0.10

Add:
Min:  8
Quantity Discounts
8-466$0.10
467-2,999$0.08
3,000+$0.05
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...
3788
$0.11

Add:
Min:  8
Quantity Discounts
8-424$0.11
425-2,727$0.08
2,728+$0.06
AS568-318 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70318

AS568-318 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1"ID X 1-3/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
511
$0.11

Add:
Min:  7
Quantity Discounts
7-424$0.11
425-2,727$0.08
2,728+$0.06
AS568-319 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70319

AS568-319 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-1/16"ID X 1-7/16"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
40
$0.12

Add:
Min:  7
Quantity Discounts
7-388$0.12
389-2,499$0.09
2,500+$0.06
AS568-320 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70320

AS568-320 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-1/8"ID X 1-1/2"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
3919
$0.13

Add:
Min:  7
Quantity Discounts
7-358$0.13
359-2,307$0.10
2,308+$0.07
AS568-321 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70321

AS568-321 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-3/16"ID X 1-9/16"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
987
$0.13

Add:
Min:  6
Quantity Discounts
6-358$0.13
359-2,307$0.10
2,308+$0.07
AS568-322 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70322

AS568-322 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-1/4"ID X 1-5/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
352
$0.14

Add:
Min:  6
Quantity Discounts
6-333$0.14
334-2,142$0.11
2,143+$0.07
AS568-323 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70323

AS568-323 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-5/16"ID X 1-11/16"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
1197
$0.14

Add:
Min:  5
Quantity Discounts
5-333$0.14
334-2,142$0.11
2,143+$0.07
AS568-324 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70324

AS568-324 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-3/8"ID X 1-3/4"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
236
$0.15

Add:
Min:  5
Quantity Discounts
5-311$0.15
312-1,999$0.11
2,000+$0.08
AS568-325 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70325

AS568-325 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-1/2"ID X 1-7/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
1239
$0.17

Add:
Min:  5
Quantity Discounts
5-274$0.17
275-1,764$0.13
1,765+$0.09
AS568-326 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70326

AS568-326 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-5/8"ID X 2"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
70
$0.17

Add:
Min:  5
Quantity Discounts
5-274$0.17
275-1,764$0.13
1,765+$0.09
AS568-327 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70327

AS568-327 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-3/4"ID X 2-1/8"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
329
$0.17

Add:
Min:  5
Quantity Discounts
5-274$0.17
275-1,764$0.13
1,765+$0.09
AS568-328 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring B70328

AS568-328 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring

1-7/8"ID X 2-1/4"OD X 3/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$0.20

Add:
Min:  4
Quantity Discounts
4-233$0.20
234-1,499$0.15
1,500+$0.10