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-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.




Image Model+ Item Name Qty. 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...
288
$1.67

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Quantity Discounts
1-399$1.67
400-1,796$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

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Min Qty:  178
Quantity Discounts
178-394$1.69
395-1,775$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 Qty:  167
Quantity Discounts
167-370$1.80
371-1,666$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 Qty:  164
Quantity Discounts
164-362$1.84
363-1,630$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

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Min Qty:  162
Quantity Discounts
162-358$1.86
359-1,612$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 Qty:  159
Quantity Discounts
159-352$1.89
353-1,587$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 Qty:  158
Quantity Discounts
158-349$1.91
350-1,570$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...
62
$1.94

Add:

Quantity Discounts
1-343$1.94
344-1,546$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...
438
$1.96

Add:

Quantity Discounts
1-340$1.96
341-1,530$1.47
1,531+$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...
3
$1.99

Add:

Quantity Discounts
1-335$1.99
336-1,507$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 Qty:  148
Quantity Discounts
148-326$2.04
327-1,470$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 Qty:  144
Quantity Discounts
144-318$2.09
319-1,435$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...
449
$2.13

Add:

Quantity Discounts
1-312$2.13
313-1,408$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 Qty:  138
Quantity Discounts
138-305$2.18
306-1,376$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...
481
$2.21

Add:

Quantity Discounts
1-301$2.21
302-1,357$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 Qty:  105
Quantity Discounts
105-232$2.87
233-1,045$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 Qty:  104
Quantity Discounts
104-230$2.89
231-1,038$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...
290
$2.94

Add:

Quantity Discounts
1-226$2.94
227-1,020$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 Qty:  99
Quantity Discounts
99-219$3.04
220-986$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
1-212$3.14
213-955$2.36
956+$1.57