-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 41 (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...
 In Stock: 243
$2.680
Add:
Quantity Discounts
1-499$2.680
500-1,899$1.910
1,900+$1.337
(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...
 In Stock: 0
$2.700
Add:
Min Qty:  200
Quantity Discounts
200-499$2.700
500-1,899$1.929
1,900+$1.350
(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...
 In Stock: 0
$2.840
Add:
Min Qty:  200
Quantity Discounts
200-499$2.840
500-1,799$2.028
1,800+$1.419
(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...
 In Stock: 0
$2.900
Add:
Min Qty:  200
Quantity Discounts
200-499$2.900
500-1,699$2.069
1,700+$1.448
(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...
 In Stock: 0
$2.930
Add:
Min Qty:  200
Quantity Discounts
200-499$2.930
500-1,699$2.093
1,700+$1.465
(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...
 In Stock: 0
$2.970
Add:
Min Qty:  200
Quantity Discounts
200-499$2.970
500-1,699$2.116
1,700+$1.481
(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...
 In Stock: 0
$3.000
Add:
Min Qty:  200
Quantity Discounts
200-499$3.000
500-1,699$2.140
1,700+$1.498
(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...
 In Stock: 237
$3.030
Add:
Quantity Discounts
1-499$3.030
500-1,699$2.163
1,700+$1.514
(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...
 In Stock: 337
$3.060
Add:
Quantity Discounts
1-499$3.060
500-1,599$2.186
1,600+$1.530
(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...
 In Stock: 0
$3.100
Add:
Min Qty:  200
Quantity Discounts
200-499$3.100
500-1,599$2.210
1,600+$1.547
(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...
 In Stock: 0
$3.160
Add:
Min Qty:  200
Quantity Discounts
200-399$3.160
400-1,599$2.258
1,600+$1.580
(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...
 In Stock: 0
$3.230
Add:
Min Qty:  200
Quantity Discounts
200-399$3.230
400-1,599$2.303
1,600+$1.612
(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...
 In Stock: 325
$3.290
Add:
Quantity Discounts
1-399$3.290
400-1,499$2.350
1,500+$1.645
(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...
 In Stock: 0
$3.360
Add:
Min Qty:  200
Quantity Discounts
200-399$3.360
400-1,499$2.398
1,500+$1.678
(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...
 In Stock: 231
$3.390
Add:
Quantity Discounts
1-399$3.390
400-1,499$2.420
1,500+$1.694
(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...
 In Stock: 0
$4.630
Add:
Min Qty:  150
Quantity Discounts
150-299$4.630
300-1,099$3.308
1,100+$2.315
(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...
 In Stock: 0
$4.660
Add:
Min Qty:  150
Quantity Discounts
150-299$4.660
300-1,099$3.326
1,100+$2.328
(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...
 In Stock: 271
$4.730
Add:
Quantity Discounts
1-299$4.730
300-1,099$3.373
1,100+$2.361
(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...
 In Stock: 646
$4.860
Add:
Quantity Discounts
1-299$4.860
300-999$3.466
1,000+$2.426
(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...
 In Stock: 318
$4.990
Add:
Quantity Discounts
1-299$4.990
300-999$3.560
1,000+$2.492
(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...
 In Stock: 0
$5.000
Add:
Min Qty:  100
Quantity Discounts
100-299$5.000
300-999$3.569
1,000+$2.498
(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...
 In Stock: 0
$5.090
Add:
Min Qty:  100
Quantity Discounts
100-299$5.090
300-999$3.635
1,000+$2.544
(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...
 In Stock: 0
$5.250
Add:
Min Qty:  100
Quantity Discounts
100-299$5.250
300-999$3.748
1,000+$2.623
(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...
 In Stock: 0
$5.510
Add:
Min Qty:  100
Quantity Discounts
100-299$5.510
300-899$3.935
900+$2.754
(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...
 In Stock: 0
$5.680
Add:
Min Qty:  100
Quantity Discounts
100-199$5.680
200-899$4.058
900+$2.840
(image for) AS568-450 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50450
AS568-450 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
10-1/2"ID X 11"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 77
$9.440
Add:
Quantity Discounts
1-99$9.440
100-499$6.743
500+$4.720
(image for) AS568-451 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50451
AS568-451 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
11"ID X 11-1/2"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$9.530
Add:
Min Qty:  50
Quantity Discounts
50-99$9.530
100-499$6.805
500+$4.763
(image for) AS568-452 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50452
AS568-452 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
11-1/2"ID X 12"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$9.650
Add:
Min Qty:  50
Quantity Discounts
50-99$9.650
100-499$6.888
500+$4.821
(image for) AS568-453 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50453
AS568-453 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
12"ID X 12-1/2"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 131
$9.730
Add:
Quantity Discounts
1-99$9.730
100-499$6.946
500+$4.862
(image for) AS568-454 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50454
AS568-454 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
12-1/2"ID X 13"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 121
$9.830
Add:
Quantity Discounts
1-99$9.830
100-499$7.016
500+$4.911
(image for) AS568-455 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50455
AS568-455 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
13"ID X 13-1/2"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$9.920
Add:
Min Qty:  50
Quantity Discounts
50-99$9.920
100-499$7.086
500+$4.960
(image for) AS568-456 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50456
AS568-456 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
13-1/2" ID X 14" OD X 1/4" CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known...
 In Stock: 0
$10.040
Add:
Min Qty:  50
Quantity Discounts
50-99$10.040
100-499$7.170
500+$5.019
(image for) AS568-457 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50457
AS568-457 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
14"ID X 14-1/2"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$10.150
Add:
Min Qty:  50
Quantity Discounts
50-99$10.150
100-499$7.246
500+$5.072
(image for) AS568-458 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50458
AS568-458 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
14-1/2"ID X 15"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$10.270
Add:
Min Qty:  50
Quantity Discounts
50-99$10.270
100-499$7.336
500+$5.135
(image for) AS568-459 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50459
AS568-459 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
15"ID X 15-1/2"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$10.350
Add:
Min Qty:  50
Quantity Discounts
50-99$10.350
100-499$7.389
500+$5.172
(image for) AS568-460 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50460
AS568-460 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
15-1/2"ID X 16"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$15.150
Add:
Min Qty:  50
Quantity Discounts
50-99$15.150
100-299$10.820
300+$7.574
(image for) AS568-461 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50461
AS568-461 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
16"ID X 16-1/2"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$15.380
Add:
Min Qty:  50
Quantity Discounts
50-99$15.380
100-299$10.985
300+$7.689
(image for) AS568-462 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50462
AS568-462 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
16-1/2"ID X 17"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$15.390
Add:
Min Qty:  50
Quantity Discounts
50-99$15.390
100-299$10.989
300+$7.692
(image for) AS568-463 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50463
AS568-463 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
17"ID X 17-1/2"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 19
$15.450
Add:
Quantity Discounts
1-99$15.450
100-299$11.036
300+$7.725
(image for) AS568-464 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50464
AS568-464 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
17-1/2"ID X 18"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$15.510
Add:
Min Qty:  50
Quantity Discounts
50-99$15.510
100-299$11.073
300+$7.751
(image for) AS568-465 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring B50465
AS568-465 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring
18"ID X 18-1/2"OD X 1/4"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as...
 In Stock: 0
$15.590
Add:
Min Qty:  50
Quantity Discounts
50-99$15.590
100-299$11.130
300+$7.791
Displaying 1 to 41 (of 41 Products)
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