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O-Rings

-300 Series - 0.210 - 3/16" CS

50 Durometer, Commercial Grade Soft Buna-N O-Rings

Designed for applications requiring soft O-Ring sealing material. Primarily used as a low pressure static seal or gasket. Buna-N compound materials are "standard” for most O-Ring service. While they are not as strong as other Buna-N O-Rings, Soft Buna-N O-Rings require less force to make an effective seal and conform better to uneven surfaces. They are suitable for a broad range of fluids including oils, water, and mild chemicals.




Image Model+ Item Name Qty. Price Quantity Discounts
AS568-309 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50309

AS568-309 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

7/16"ID X 13/16"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$0.08

Add:
Min Qty:  6,250
Quantity Discounts
6250-8,203$0.08
8,204-52,083$0.064
52,084+$0.048
AS568-310 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50310

AS568-310 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1/2"ID X 7/8"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
6,528
$0.09

Add:
Min Qty:  12
Quantity Discounts
12-7,291$0.09
7,292-46,296$0.072
46,297+$0.054
AS568-311 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50311

AS568-311 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

9/16"ID X 15/16"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
117,894
$0.10

Add:
Min Qty:  10
Quantity Discounts
10-6,562$0.10
6,563-41,666$0.08
41,667+$0.06
AS568-312 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50312

AS568-312 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

5/8"ID X 1"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
0
$0.11

Add:
Min Qty:  4,546
Quantity Discounts
4546-5,965$0.11
5,966-37,878$0.088
37,879+$0.066
AS568-313 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50313

AS568-313 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

11/16"ID X 1-1/16"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
0
$0.11

Add:
Min Qty:  4,546
Quantity Discounts
4546-5,965$0.11
5,966-37,878$0.088
37,879+$0.066
AS568-314 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50314

AS568-314 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

3/4"ID X 1-1/8"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
5,204
$0.12

Add:
Min Qty:  9
Quantity Discounts
9-5,468$0.12
5,469-34,722$0.096
34,723+$0.072
AS568-315 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50315

AS568-315 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

13/16"ID X 1-3/16"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
0
$0.13

Add:
Min Qty:  3,847
Quantity Discounts
3847-5,048$0.13
5,049-32,051$0.104
32,052+$0.078
AS568-316 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50316

AS568-316 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

7/8"ID X 1-1/4"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$0.13

Add:
Min Qty:  3,847
Quantity Discounts
3847-5,048$0.13
5,049-32,051$0.104
32,052+$0.078
AS568-317 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50317

AS568-317 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

15/16"ID X 1-5/16"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
0
$0.15

Add:
Min Qty:  3,334
Quantity Discounts
3334-4,374$0.15
4,375-27,777$0.12
27,778+$0.09
AS568-318 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50318

AS568-318 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1"ID X 1-3/8"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
0
$0.16

Add:
Min Qty:  3,125
Quantity Discounts
3125-4,101$0.16
4,102-26,041$0.128
26,042+$0.096
AS568-319 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50319

AS568-319 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-1/16"ID X 1-7/16"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
0
$0.16

Add:
Min Qty:  3,125
Quantity Discounts
3125-4,101$0.16
4,102-26,041$0.128
26,042+$0.096
AS568-320 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50320

AS568-320 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-1/8"ID X 1-1/2"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$0.17

Add:
Min Qty:  2,942
Quantity Discounts
2942-3,860$0.17
3,861-24,509$0.136
24,510+$0.102
AS568-321 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50321

AS568-321 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of...
0
$0.18

Add:
Min Qty:  2,778
Quantity Discounts
2778-3,645$0.18
3,646-23,148$0.144
23,149+$0.108
AS568-322 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50322

AS568-322 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-1/4"ID X 1-5/8"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$0.19

Add:
Min Qty:  2,632
Quantity Discounts
2632-3,453$0.19
3,454-21,929$0.152
21,930+$0.114
AS568-323 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50323

AS568-323 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-5/16"ID X 1-11/16"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also...
1,684
$0.19

Add:
Min Qty:  6
Quantity Discounts
6-3,453$0.19
3,454-21,929$0.152
21,930+$0.114
AS568-324 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50324

AS568-324 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-3/8"ID X 1-3/4"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
2,368
$0.21

Add:
Min Qty:  5
Quantity Discounts
5-3,124$0.21
3,125-19,841$0.168
19,842+$0.126
AS568-325 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50325

AS568-325 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-1/2"ID X 1-7/8"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
3,411
$0.22

Add:
Min Qty:  5
Quantity Discounts
5-2,982$0.22
2,983-18,939$0.176
18,940+$0.132
AS568-326 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50326

AS568-326 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-5/8"ID X 2"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
417
$0.26

Add:
Min Qty:  4
Quantity Discounts
4-2,524$0.26
2,525-16,025$0.208
16,026+$0.156
AS568-327 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50327

AS568-327 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-3/4"ID X 2-1/8"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
2,699
$0.27

Add:
Min Qty:  4
Quantity Discounts
4-2,430$0.27
2,431-15,432$0.216
15,433+$0.162
AS568-328 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50328

AS568-328 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

1-7/8"ID X 2-1/4"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$0.27

Add:
Min Qty:  1,852
Quantity Discounts
1852-2,430$0.27
2,431-15,432$0.216
15,433+$0.162
AS568-329 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50329

AS568-329 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

2"ID X 2-3/8"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
-1,600
$0.33

Add:
Min Qty:  1,500
Quantity Discounts
1500-1,999$0.33
2,000-12,999$0.264
13,000+$0.198
AS568-330 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50330

AS568-330 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

2-1/8"ID X 2-1/2"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
3,799
$0.32

Add:
Min Qty:  4
Quantity Discounts
4-2,050$0.32
2,051-13,020$0.256
13,021+$0.192
AS568-331 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50331

AS568-331 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of...
1,796
$0.33

Add:
Min Qty:  4
Quantity Discounts
4-1,988$0.33
1,989-12,626$0.264
12,627+$0.198
AS568-332 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50332

AS568-332 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

2-3/8"ID X 2-3/4"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
163
$0.34

Add:
Min Qty:  3
Quantity Discounts
3-1,930$0.34
1,931-12,254$0.272
12,255+$0.204
AS568-333 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50333

AS568-333 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring

2-1/2"ID X 2-7/8"OD X 3/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
0
$0.35

Add:
Min Qty:  3
Quantity Discounts
3-1,874$0.35
1,875-11,904$0.28
11,905+$0.21