-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

Dimensions: 4-1/2" ID x 5" OD x 1/4" CS The AS568-425 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 4.475 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 213
$4.240
Add:
Min Qty:  5
Quantity Discounts
5-111$4.240
112-639$1.115
640-1,599$0.780
1,600+$0.624
(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

Dimensions: 4-5/8" ID x 5-1/8" OD x 1/4" CS The AS568-426 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 4.600 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$4.280
Add:
Min Qty:  40
Quantity Discounts
40-110$4.280
111-629$1.126
630-1,599$0.788
1,600+$0.630
(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

Dimensions: 4-3/4" ID x 5-1/4" OD x 1/4" CS The AS568-427 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 4.725 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$4.500
Add:
Min Qty:  40
Quantity Discounts
40-105$4.500
106-599$1.183
600-1,499$0.828
1,500+$0.662
(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

Dimensions: 4-7/8" ID x 5-3/8" OD x 1/4" CS The AS568-428 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 4.850 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$4.600
Add:
Min Qty:  40
Quantity Discounts
40-102$4.600
103-589$1.208
590-1,499$0.845
1,500+$0.676
(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

Dimensions: 5" ID x 5-1/2" OD x 1/4" CS The AS568-429 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 4.975 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$4.640
Add:
Min Qty:  40
Quantity Discounts
40-101$4.640
102-589$1.220
590-1,499$0.854
1,500+$0.683
(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

Dimensions: 5-1/8" ID x 5-5/8" OD x 1/4" CS The AS568-430 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 5.100 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$4.700
Add:
Min Qty:  40
Quantity Discounts
40-100$4.700
101-579$1.235
580-1,399$0.864
1,400+$0.691
(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

Dimensions: 5-1/4" ID x 5-3/4" OD x 1/4" CS The AS568-431 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 5.225 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$4.750
Add:
Min Qty:  40
Quantity Discounts
40-99$4.750
100-569$1.249
570-1,399$0.874
1,400+$0.699
(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

Dimensions: 5-3/8" ID x 5-7/8" OD x 1/4" CS The AS568-432 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 5.350 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 130
$4.800
Add:
Min Qty:  5
Quantity Discounts
5-98$4.800
99-569$1.262
570-1,399$0.883
1,400+$0.706
(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

Dimensions: 5-1/2" ID x 6" OD x 1/4" CS The AS568-433 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 5.475 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 317
$4.850
Add:
Min Qty:  5
Quantity Discounts
5-97$4.850
98-559$1.275
560-1,399$0.892
1,400+$0.713
(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

Dimensions: 5-5/8" ID x 6-1/8" OD x 1/4" CS The AS568-434 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 5.600 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$4.900
Add:
Min Qty:  40
Quantity Discounts
40-96$4.900
97-549$1.290
550-1,399$0.903
1,400+$0.722
(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

Dimensions: 5-3/4" ID x 6-1/4" OD x 1/4" CS The AS568-435 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 5.725 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$5.010
Add:
Min Qty:  40
Quantity Discounts
40-94$5.010
95-539$1.318
540-1,399$0.922
1,400+$0.737
(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

Dimensions: 5-7/8" ID x 6-3/8" OD x 1/4" CS The AS568-436 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 5.850 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$5.110
Add:
Min Qty:  40
Quantity Discounts
40-92$5.110
93-529$1.343
530-1,299$0.940
1,300+$0.752
(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

Dimensions: 6" ID x 6-1/2" OD x 1/4" CS The AS568-437 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 5.975 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 196
$5.220
Add:
Min Qty:  5
Quantity Discounts
5-90$5.220
91-519$1.372
520-1,299$0.960
1,300+$0.768
(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

Dimensions: 6-1/4" ID x 6-3/4" OD x 1/4" CS The AS568-438 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 6.225 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$5.320
Add:
Min Qty:  40
Quantity Discounts
40-88$5.320
89-509$1.399
510-1,299$0.979
1,300+$0.783
(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

Dimensions: 6-1/2" ID x 7" OD x 1/4" CS The AS568-439 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 6.475 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 216
$5.370
Add:
Min Qty:  5
Quantity Discounts
5-88$5.370
89-509$1.412
510-1,299$0.988
1,300+$0.790
(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

Dimensions: 6-3/4" ID x 7-1/4" OD x 1/4" CS The AS568-440 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 6.725 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$7.340
Add:
Min Qty:  30
Quantity Discounts
30-64$7.340
65-369$1.928
370-899$1.349
900+$1.079
(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

Dimensions: 7" ID x 7-1/2" OD x 1/4" CS The AS568-441 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 6.975 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$7.380
Add:
Min Qty:  30
Quantity Discounts
30-63$7.380
64-369$1.940
370-899$1.358
900+$1.086
(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

Dimensions: 7-1/4" ID x 7-3/4" OD x 1/4" CS The AS568-442 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 7.225 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 266
$7.480
Add:
Min Qty:  5
Quantity Discounts
5-63$7.480
64-359$1.965
360-899$1.375
900+$1.100
(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

Dimensions: 7-1/2" ID x 8" OD x 1/4" CS The AS568-443 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 7.475 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 644
$7.690
Add:
Min Qty:  5
Quantity Discounts
5-61$7.690
62-349$2.020
350-899$1.414
900+$1.131
(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

Dimensions: 7-3/4" ID x 8-1/4" OD x 1/4" CS The AS568-444 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 7.725 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 313
$7.900
Add:
Min Qty:  5
Quantity Discounts
5-59$7.900
60-339$2.076
340-899$1.453
900+$1.162
(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

Dimensions: 8" ID x 8-1/2" OD x 1/4" CS The AS568-445 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 7.975 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$7.920
Add:
Min Qty:  20
Quantity Discounts
20-59$7.920
60-339$2.082
340-899$1.457
900+$1.165
(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

Dimensions: 8-1/2" ID x 9" OD x 1/4" CS The AS568-446 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 8.475 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$8.070
Add:
Min Qty:  20
Quantity Discounts
20-58$8.070
59-339$2.119
340-799$1.483
800+$1.186
(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

Dimensions: 9" ID x 9-1/2" OD x 1/4" CS The AS568-447 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 8.975 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$8.320
Add:
Min Qty:  20
Quantity Discounts
20-56$8.320
57-329$2.185
330-799$1.529
800+$1.223
(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

Dimensions: 9-1/2" ID x 10" OD x 1/4" CS The AS568-448 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 9.475 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 7
$8.730
Add:
Min Qty:  5
Quantity Discounts
5-54$8.730
55-309$2.293
310-799$1.605
800+$1.284
(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

Dimensions: 10" ID x 10-1/2" OD x 1/4" CS The AS568-449 is a Buna-N (Nitrile) 50A Durometer O-Ring with an inside diameter of 9.975 inches and a cross-section of 0.275 inches. It is built for low-pressure and vacuum sealing on soft, uneven or lightly loaded surfaces where an extra-soft seal conforms better than standard nitrile. This O-Ring is stocked and shipped same-day by The O-Ring Store LLC, an ISO 9001:2015 certified distributor. Seal...
In Stock: 0
$9.000
Add:
Min Qty:  20
Quantity Discounts
20-52$9.000
53-299$2.365
300-799$1.655
800+$1.324
Displaying 1 to 25 (of 41 Products)