Buna-N Nitrile (NBR) 70 Duro Round O-Ring Cord

Round O-Ring cords are the most common type of O-Ring. The round profile is very versatile and can provide an effective seal for a wide range of pressures, temperatures, and fluid types. In a properly designed sealing groove, a round O-Ring can deform under pressure to fill the gap and prevent the passage of fluid.

One of the key advantages of O-Ring cord is that it can be cut to the exact length required and joined to form an O-Ring of a specific size. This is particularly useful for large or non-standard sizes, where a pre-made O-Ring may not be readily available. However, a joint in an O-Ring can be a potential weak point, so this approach is typically used for less critical applications or when the operating conditions are not overly demanding.

As with any type of seal, the effectiveness of an O-Ring is highly dependent on the specific application conditions, including pressure, temperature, the type of fluid being sealed, and the mechanical design of the sealing groove. The decision to use a round Buna O-Ring cord or any other type of O-Ring should be based on a thorough consideration of these factors.

Displaying 1 to 25 (of 51 Products)
Product Image Model Product Name Qty. Price Quantity Discounts
(image for) .210" (5.33mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.210
.210" (5.33mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 548
$0.570
Add:
Min Qty:  7
Quantity Discounts
7-99$0.570
100-999$0.602
1,000+$0.484
(image for) .275" (7.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.275
.275" (7.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 2434
$0.920
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Min Qty:  7
Quantity Discounts
7-99$0.920
100-999$0.698
1,000+$0.561
(image for) .070" (1.78mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.070
.070" (1.78mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 5757
$0.340
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Min Qty:  7
Quantity Discounts
7-99$0.340
100-999$0.255
1,000+$0.205
(image for) .103" (2.62mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.103
.103" (2.62mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 3740
$0.400
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Min Qty:  7
Quantity Discounts
7-99$0.400
100-499$0.320
500+$0.270
(image for) .139" (3.53mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.139
.139" (3.53mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 2021
$0.420
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Min Qty:  7
Quantity Discounts
7-99$0.420
100-999$0.418
1,000+$0.336
(image for) .040" (1.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.040
.040" (1.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 5605
$0.730
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Min Qty:  7
Quantity Discounts
7-99$0.730
100-999$0.395
1,000+$0.318
(image for) .079" (2.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.079
.079" (2.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 10032
$0.330
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Min Qty:  7
Quantity Discounts
7-99$0.330
100-999$0.275
1,000+$0.221
(image for) .118" (3.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.118
.118" (3.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 2853
$0.450
Add:
Min Qty:  7
Quantity Discounts
7-99$0.450
100-999$0.314
1,000+$0.252
(image for) .157" (4.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.157
.157" (4.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 1209
$0.520
Add:
Min Qty:  7
Quantity Discounts
7-99$0.520
100-999$0.418
1,000+$0.336
(image for) .295" (7.50mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.295
.295" (7.50mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 806
$1.670
Add:
Quantity Discounts
1-99$1.670
100-999$1.034
1,000+$0.831
(image for) .197" (5.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.197
.197" (5.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 65
$0.850
Add:
Min Qty:  7
Quantity Discounts
7-99$0.850
100-999$0.591
1,000+$0.475
(image for) .236" (6.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.236
.236" (6.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 1669
$1.100
Add:
Min Qty:  7
Quantity Discounts
7-99$1.100
100-999$0.670
1,000+$0.538
(image for) .224" (5.70mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.224
.224" (5.70mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 747
$0.890
Add:
Min Qty:  7
Quantity Discounts
7-99$0.890
100-999$0.574
1,000+$0.462
(image for) .331" (8.40mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.331
.331" (8.40mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 399
$1.840
Add:
Quantity Discounts
1-99$1.840
100-999$0.992
1,000+$0.797
(image for) .354" (9.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.354
.354" (9.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 733
$1.990
Add:
Min Qty:  2
Quantity Discounts
2-99$1.990
100-999$1.020
1,000+$0.819
(image for) .394" (10mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.394
.394" (10mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 771
$1.950
Add:
Quantity Discounts
1-99$1.950
100-999$1.336
1,000+$1.074
(image for) .472" (12mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.472
.472" (12mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 425
$4.340
Add:
Quantity Discounts
1-99$4.340
100-999$2.347
1,000+$1.886
(image for) .550" (14mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.550
.550" (14mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot  Long runs will be depending on factory production. Our Round Buna-N...
In Stock: 64
$4.690
Add:
Quantity Discounts
1-99$4.690
100-999$2.534
1,000+$2.037
(image for) Black Rubber Toughened O-ring Glue 2gm Vial 04-143B-TF
Black Rubber Toughened O-ring Glue 2gm Vial
Turbo Fuse Black Rubber Toughened Cyanoacrylate Adhesive Viscosity 300 Palm Lab's Cyanoacrylate is a one component rapid bonding adhesive. TURBO...
In Stock: 95
$3.000
Add:
Min Qty:  0
Quantity Discounts
1$3.000
2-24$2.750
25+$2.000
(image for) .500" (12.7mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.500
.500" (12.7mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot  Long runs will be depending on factory production. Our Round Buna-N...
In Stock: 1413
$2.550
Add:
Quantity Discounts
1-99$2.550
100-999$2.210
1,000+$1.776
(image for) .188" (4.78mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.188
.188" (4.78mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 613
$0.820
Add:
Min Qty:  7
Quantity Discounts
7-99$0.820
100-999$0.443
1,000+$0.356
(image for) .098" (2.50mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.098
.098" (2.50mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 406
$0.360
Add:
Min Qty:  7
Quantity Discounts
7-99$0.360
100-999$0.283
1,000+$0.228
(image for) .313" (8.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.313
.313" (8.00mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 315
$1.300
Add:
Quantity Discounts
1-99$1.300
100-999$0.927
1,000+$0.745
(image for) .375" (9.53mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.375
.375" (9.53mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 6568
$1.490
Add:
Quantity Discounts
1-99$1.490
100-999$1.308
1,000+$1.051
(image for) .437" (11mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.437
.437" (11mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black
Round Nitrile, Buna-N (NBR) O-Ring Cord - Available by the Foot We spool 100' runs in house. Longer runs will be depending on factory production....
In Stock: 3543
$2.150
Add:
Quantity Discounts
1-99$2.150
100-999$1.725
1,000+$1.386
Displaying 1 to 25 (of 51 Products)
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1847 Wilma Dr, Clarkston WA 99403
Phone 208-413-6377 - Fax 208-413-6719