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-400 Series - 0.275 -1/4" CS

50 Durometer, Commercial Grade Soft Buna-N

Designed for applications requiring soft O-ring sealing material. Primarily used as a low pressure static seal or gasket. B50 O-rings not in stock may take up to 7 weeks to ship. 6" ID & larger Vulcanized O-Rings available to reduce delivery times and minimum orders. Link to order B50 Vulcanized O-Rings.

Size not listed, special requirements or large quantities please click this link to Request a Price Quote.

 




Image Model+ Item Name Stock Price Quantity Discounts
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...
4
$1.67

Add:

Quantity Discounts
1-279$1.67
280-1,796$1.25
1,797+$0.84
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...
0
$1.69

Add:
Min:  119
Quantity Discounts
119-276$1.69
277-1,775$1.27
1,776+$0.85
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...
0
$1.80

Add:
Min:  112
Quantity Discounts
112-259$1.80
260-1,666$1.35
1,667+$0.90
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...
0
$1.84

Add:
Min:  109
Quantity Discounts
109-253$1.84
254-1,630$1.38
1,631+$0.92
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...
0
$1.86

Add:
Min:  108
Quantity Discounts
108-250$1.86
251-1,612$1.40
1,613+$0.93
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...
0
$1.89

Add:
Min:  106
Quantity Discounts
106-246$1.89
247-1,587$1.42
1,588+$0.95
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...
0
$1.91

Add:
Min:  105
Quantity Discounts
105-244$1.91
245-1,570$1.43
1,571+$0.96
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...
76
$1.94

Add:

Quantity Discounts
1-240$1.94
241-1,546$1.46
1,547+$0.97
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...
437
$1.96

Add:

Quantity Discounts
1-17$1.96
18-102$1.47
103+$0.98
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...
12
$1.99

Add:

Quantity Discounts
1-234$1.99
235-1,507$1.49
1,508+$1.00
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...
0
$2.04

Add:
Min:  99
Quantity Discounts
99-228$2.04
229-1,470$1.53
1,471+$1.02
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...
0
$2.09

Add:
Min:  96
Quantity Discounts
96-223$2.09
224-1,435$1.57
1,436+$1.05
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...
482
$2.13

Add:

Quantity Discounts
1-219$2.13
220-1,408$1.60
1,409+$1.07
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...
0
$2.18

Add:
Min:  92
Quantity Discounts
92-214$2.18
215-1,376$1.64
1,377+$1.09
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...
496
$2.21

Add:

Quantity Discounts
1-211$2.21
212-1,357$1.66
1,358+$1.11
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...
0
$2.87

Add:
Min:  70
Quantity Discounts
70-162$2.87
163-1,045$2.15
1,046+$1.44
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...
0
$2.89

Add:
Min:  70
Quantity Discounts
70-161$2.89
162-1,038$2.17
1,039+$1.45
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...
0
$2.94

Add:
Min:  69
Quantity Discounts
69-158$2.94
159-1,020$2.21
1,021+$1.47
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...
0
$3.04

Add:
Min:  66
Quantity Discounts
66-153$3.04
154-986$2.28
987+$1.52
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...
345
$3.14

Add:

Quantity Discounts
1-148$3.14
149-955$2.36
956+$1.57
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...
0
$3.15

Add:
Min:  64
Quantity Discounts
64-148$3.15
149-952$2.36
953+$1.58
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...
0
$3.22

Add:
Min:  63
Quantity Discounts
63-144$3.22
145-931$2.42
932+$1.61
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...
0
$3.34

Add:
Min:  60
Quantity Discounts
60-139$3.34
140-898$2.51
899+$1.67
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...
0
$3.53

Add:
Min:  57
Quantity Discounts
57-132$3.53
133-849$2.65
850+$1.77
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...
0
$3.66

Add:
Min:  55
Quantity Discounts
55-127$3.66
128-819$2.75
820+$1.83
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...
95
$5.69

Add:

Quantity Discounts
1-82$5.69
83-527$4.27
528+$2.85
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...
0
$5.75

Add:
Min:  35
Quantity Discounts
35-81$5.75
82-521$4.31
522+$2.88
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...
0
$5.84

Add:
Min:  35
Quantity Discounts
35-79$5.84
80-513$4.38
514+$2.92
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...
141
$5.90

Add:

Quantity Discounts
1-79$5.90
80-508$4.43
509+$2.95
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...
125
$5.97

Add:

Quantity Discounts
1-78$5.97
79-502$4.48
503+$2.99
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...
0
$6.05

Add:
Min:  34
Quantity Discounts
34-77$6.05
78-495$4.54
496+$3.03
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...
0
$6.13

Add:
Min:  33
Quantity Discounts
33-76$6.13
77-489$4.60
490+$3.07
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...
0
$6.21

Add:
Min:  33
Quantity Discounts
33-75$6.21
76-483$4.66
484+$3.11
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...
0
$6.31

Add:
Min:  32
Quantity Discounts
32-73$6.31
74-475$4.73
476+$3.16
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...
0
$6.36

Add:

Quantity Discounts
1-73$6.36
74-471$4.77
472+$3.18
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...
0
$9.06

Add:
Min:  23
Quantity Discounts
23-51$9.06
52-331$6.80
332+$4.53
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...
0
$9.23

Add:
Min:  22
Quantity Discounts
22-50$9.23
51-325$6.92
326+$4.62
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...
0
$9.23

Add:
Min:  22
Quantity Discounts
22-50$9.23
51-325$6.92
326+$4.62
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...
23
$9.28

Add:

Quantity Discounts
1-50$9.28
51-323$6.96
324+$4.64
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...
0
$9.32

Add:
Min:  22
Quantity Discounts
22-50$9.32
51-321$6.99
322+$4.66
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...
0
$9.38

Add:
Min:  22
Quantity Discounts
22-49$9.38
50-319$7.04
320+$4.69
5" to 12" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring VN50.275-012

5" to 12" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring

Rubber Toughened Cyanoacrylate Bonded Buna-N 50 Duro O-Rings: The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or...
2
$7.50



Quantity Discounts
1$7.50
2-9$6.75
10+$5.63
12" to 18" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring VN50.275-018

12" to 18" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring

Rubber Toughened Cyanoacrylate Bonded Buna-N 50 Duro O-Rings: The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or...
0
$8.00



Quantity Discounts
1$8.00
2-9$7.20
10+$6.00
18" to 24" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring VN50.275-024

18" to 24" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring

Rubber Toughened Cyanoacrylate Bonded Buna-N 50 Duro O-Rings: The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or...
0
$10.00



Quantity Discounts
1$10.00
2-9$9.00
10+$7.50
24" to 30" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring VN50.275-030

24" to 30" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring

Rubber Toughened Cyanoacrylate Bonded Buna-N 50 Duro O-Rings: The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or...
0
$11.00



Quantity Discounts
1$11.00
2-9$9.90
10+$8.25
30" to 36" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring VN50.275-036

30" to 36" ID X 0.275" (7.00mm) C/S Buna-N 50 Cold Bonded O-Ring

Rubber Toughened Cyanoacrylate Bonded Buna-N 50 Duro O-Rings: The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or...
0
$14.00



Quantity Discounts
1$14.00
2-9$12.60
10+$10.50