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 26 to 50 (of 51 Products)
Product Image Model Product Name Qty. Price Quantity Discounts
(image for) .250" (6.35mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.250
.250" (6.35mm) 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: 1753
$1.370
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Min Qty:  7
Quantity Discounts
7-99$1.370
100-999$0.737
1,000+$0.592
(image for) .256" (6.50mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.256
.256" (6.50mm) 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: 43
$1.250
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Min Qty:  7
Quantity Discounts
7-99$1.250
100-999$0.996
1,000+$0.798
(image for) .256'' (6.50mm) Buna-N 70 O-Ring Cord Stock, 25' Piece, Black N70.256/25
.256'' (6.50mm) Buna-N 70 O-Ring Cord Stock, 25' Piece, Black
Round Nitrile, Buna-N (NBR): Round Buna-N Nitrile O-Ring Cord is an essential component for many industries, providing a reliable seal for hydraulic...
In Stock: 1
$35.000
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Quantity Discounts
1$35.000
2-9$23.670
10+$19.725
(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) .275'' (1/4" Nominal, 7 mm) Buna-N 70 O-Ring Cord Stock, 10' Piece, Black N70.275/10
.275'' (1/4" Nominal, 7 mm) Buna-N 70 O-Ring Cord Stock, 10' Piece, Black
Round Nitrile, Buna-N (NBR): Round Buna-N Nitrile O-Ring Cord is an essential component for many industries, providing a reliable seal for hydraulic...
In Stock: 1
$9.200
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Quantity Discounts
1$9.200
2-9$8.964
10+$7.470
(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
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Quantity Discounts
1-99$1.670
100-999$1.034
1,000+$0.831
(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
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Quantity Discounts
1-99$1.300
100-999$0.927
1,000+$0.745
(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) .331'' (8.40mm) Buna-N 70 O-Ring Cord Stock, 10' Piece, Black N70.331/10
.331'' (8.40mm) Buna-N 70 O-Ring Cord Stock, 10' Piece, Black
Round Nitrile, Buna-N (NBR): Round Buna-N Nitrile O-Ring Cord is an essential component for many industries, providing a reliable seal for hydraulic...
In Stock: 10
$18.400
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Quantity Discounts
1$18.400
2-9$12.744
10+$10.620
(image for) .331'' (8.40mm) Buna-N 70 O-Ring Cord Stock, 18' Piece, Black N70.331/18
.331'' (8.40mm) Buna-N 70 O-Ring Cord Stock, 18' Piece, Black
Round Nitrile, Buna-N (NBR): Round Buna-N Nitrile O-Ring Cord is an essential component for many industries, providing a reliable seal for hydraulic...
In Stock: 3
$33.120
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Quantity Discounts
1$33.120
2-9$22.940
10+$19.116
(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) .354" (9.00mm) Buna-N 70 O-Ring Cord Stock, 500' Spool, Black N70.354/500
.354" (9.00mm) Buna-N 70 O-Ring Cord Stock, 500' Spool, Black
Round Nitrile, Buna-N (NBR): Round Buna-N Nitrile O-Ring Cord is an essential component for many industries, providing a reliable seal for hydraulic...
In Stock: 2
$995.000
Add:
Quantity Discounts
1$995.000
2-9$509.600
10+$455.000
(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) .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
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Quantity Discounts
1-99$1.950
100-999$1.336
1,000+$1.074
(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
(image for) .437'' (11mm) Buna-N 70 O-Ring Cord Stock, 10' Piece, Black N70.437/10
.437'' (11mm) Buna-N 70 O-Ring Cord Stock, 10' Piece, Black
Round Nitrile, Buna-N (NBR): Round Buna-N Nitrile O-Ring Cord is an essential component for many industries, providing a reliable seal for hydraulic...
In Stock: 1
$21.500
Add:
Quantity Discounts
1$21.500
2-9$22.176
10+$18.480
(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) .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) .512" (13mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.512
.512" (13mm) 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: 3
$6.110
Add:
Quantity Discounts
1-99$6.110
100-999$3.304
1,000+$2.655
(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) .562" (14.27mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.562
.562" (14.27mm) 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: 0
$4.360
Add:
Quantity Discounts
1-99$4.360
100-999$3.180
1,000+$2.550
(image for) .590" (15.0mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.590
.590" (15.0mm) 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: 164
$6.010
Add:
Quantity Discounts
1-99$6.010
100-999$3.248
1,000+$2.610
(image for) .625" (16mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.625
.625" (16mm) 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: 69
$4.100
Add:
Quantity Discounts
1-99$4.100
100-999$3.668
1,000+$2.948
(image for) .625'' (16mm) Buna-N 70 O-Ring Cord Stock, 10' Piece, Black N70.625/10
.625'' (16mm) Buna-N 70 O-Ring Cord Stock, 10' Piece, Black
Round Nitrile, Buna-N (NBR): Round Buna-N Nitrile O-Ring Cord is an essential component for many industries, providing a reliable seal for hydraulic...
In Stock: 1
$41.000
Add:
Quantity Discounts
1$41.000
2-9$47.160
10+$39.300
(image for) .750" (19mm) Buna-N 70 O-Ring Cord Stock, Bulk, Black N70.750
.750" (19mm) 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: 331
$5.290
Add:
Quantity Discounts
1-99$5.290
100-999$5.799
1,000+$4.660
Displaying 26 to 50 (of 51 Products)
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1847 Wilma Dr, Clarkston WA 99403
Phone 208-413-6377 - Fax 208-413-6719