-400 Series - 0.275 -1/4" 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.

Displaying 1 to 25 (of 41 Products)
Product Image Model Product Name Qty. Price Quantity Discounts
(image for) AS568-425 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50425
AS568-425 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
4-1/2" ID X 5" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 243
$4.240
Add:
Quantity Discounts
1-19$4.240
20-999$1.059
1,000-9,999$0.794
10,000+$0.530
(image for) AS568-426 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50426
AS568-426 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
4-5/8" ID X 5-1/8" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$4.280
Add:
Min Qty:  100
Quantity Discounts
100-199$4.280
200-999$1.069
1,000-9,999$0.802
10,000+$0.535
(image for) AS568-427 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50427
AS568-427 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
4-3/4" ID X 5-1/4" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$4.500
Add:
Min Qty:  100
Quantity Discounts
100-199$4.500
200-999$1.124
1,000-9,999$0.843
10,000+$0.562
(image for) AS568-428 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50428
AS568-428 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
4-7/8" ID X 5-3/8" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$4.600
Add:
Min Qty:  100
Quantity Discounts
100-199$4.600
200-999$1.148
1,000-9,999$0.861
10,000+$0.574
(image for) AS568-429 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50429
AS568-429 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
5" ID X 5-1/2" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$4.640
Add:
Min Qty:  100
Quantity Discounts
100-199$4.640
200-999$1.160
1,000-9,999$0.870
10,000+$0.580
(image for) AS568-430 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50430
AS568-430 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
5-1/8" ID X 5-5/8" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$4.700
Add:
Min Qty:  100
Quantity Discounts
100-199$4.700
200-999$1.173
1,000-9,999$0.880
10,000+$0.587
(image for) AS568-431 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50431
AS568-431 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
5-1/4" ID X 5-3/4" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$4.750
Add:
Min Qty:  100
Quantity Discounts
100-199$4.750
200-999$1.187
1,000-9,999$0.890
10,000+$0.594
(image for) AS568-432 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50432
AS568-432 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
5-3/8" ID X 5-7/8" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 230
$4.800
Add:
Quantity Discounts
1-19$4.800
20-999$1.199
1,000-9,999$0.900
10,000+$0.600
(image for) AS568-433 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50433
AS568-433 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
5-1/2" ID X 6" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 317
$4.850
Add:
Quantity Discounts
1-19$4.850
20-999$1.212
1,000-9,999$0.909
10,000+$0.606
(image for) AS568-434 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50434
AS568-434 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
5-5/8" ID X 6-1/8" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$4.900
Add:
Min Qty:  100
Quantity Discounts
100-199$4.900
200-499$1.225
500-4,999$0.919
5,000+$0.613
(image for) AS568-435 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50435
AS568-435 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
5-3/4" ID X 6-1/4" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$5.010
Add:
Min Qty:  100
Quantity Discounts
100-199$5.010
200-499$1.252
500-4,999$0.939
5,000+$0.626
(image for) AS568-436 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50436
AS568-436 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
5-7/8" ID X 6-3/8" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$5.110
Add:
Min Qty:  100
Quantity Discounts
100-199$5.110
200-499$1.277
500-4,999$0.958
5,000+$0.639
(image for) AS568-437 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50437
AS568-437 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
6" ID X 6-1/2" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 283
$5.220
Add:
Quantity Discounts
1-9$5.220
10-499$1.303
500-4,999$0.978
5,000+$0.652
(image for) AS568-438 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50438
AS568-438 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
6-1/4"ID X 6-3/4"OD X 1/4"CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$5.320
Add:
Min Qty:  100
Quantity Discounts
100-199$5.320
200-499$1.329
500-4,999$0.997
5,000+$0.665
(image for) AS568-439 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50439
AS568-439 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
6-1/2" ID X 7" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 218
$5.370
Add:
Quantity Discounts
1-9$5.370
10-499$1.342
500-4,999$1.007
5,000+$0.671
(image for) AS568-440 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50440
AS568-440 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
6-3/4" ID X 7-1/4" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$7.340
Add:
Min Qty:  100
Quantity Discounts
100-199$7.340
200-499$1.834
500-4,999$1.376
5,000+$0.917
(image for) AS568-441 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50441
AS568-441 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
7" ID X 7-1/2" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 0
$7.380
Add:
Min Qty:  100
Quantity Discounts
100-199$7.380
200-499$1.845
500-4,999$1.384
5,000+$0.923
(image for) AS568-442 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50442
AS568-442 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
7-1/4" ID X 7-3/4" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 269
$7.480
Add:
Quantity Discounts
1-9$7.480
10-499$1.870
500-4,999$1.403
5,000+$0.935
(image for) AS568-443 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50443
AS568-443 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
7-1/2" ID X 8" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 644
$7.690
Add:
Quantity Discounts
1-9$7.690
10-499$1.922
500-4,999$1.442
5,000+$0.961
(image for) AS568-444 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50444
AS568-444 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
7-3/4" ID X 8-1/4" OD X 1/4" CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to...
 In Stock: 315
$7.900
Add:
Quantity Discounts
1-9$7.900
10-499$1.974
500-4,999$1.481
5,000+$0.987
(image for) AS568-445 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50445
AS568-445 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
8"ID X 8-1/2"OD X 1/4"CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to petroleum...
 In Stock: 0
$7.920
Add:
Min Qty:  100
Quantity Discounts
100-199$7.920
200-499$1.979
500-4,999$1.485
5,000+$0.990
(image for) AS568-446 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50446
AS568-446 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
8-1/2"ID X 9"OD X 1/4"CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to petroleum...
 In Stock: 0
$8.070
Add:
Min Qty:  100
Quantity Discounts
100-199$8.070
200-499$2.016
500-4,999$1.512
5,000+$1.008
(image for) AS568-447 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50447
AS568-447 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
9"ID X 9-1/2"OD X 1/4"CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to petroleum...
 In Stock: 0
$8.320
Add:
Min Qty:  100
Quantity Discounts
100-199$8.320
200-499$2.078
500-4,999$1.559
5,000+$1.039
(image for) AS568-448 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50448
AS568-448 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
9-1/2"ID X 10"OD X 1/4"CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to petroleum...
 In Stock: 13
$8.730
Add:
Quantity Discounts
1-199$8.730
200-499$2.182
500-4,999$1.637
5,000+$1.091
(image for) AS568-449 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50449
AS568-449 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
10"ID X 10-1/2"OD X 1/4"CS 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 Butadiene and Acrylonitirle. It has a temperature range of -40F to +250F and is exceptionally resistant to petroleum...
 In Stock: 0
$9.000
Add:
Min Qty:  100
Quantity Discounts
100-199$9.000
200-499$2.250
500-4,999$1.687
5,000+$1.125
Displaying 1 to 25 (of 41 Products)
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