AS568-913 Buna-N 70 Duro Black O-Ring for ID X CS

Buna-N O-Rings 70 Duro Black BN700100-913

$ 0.1155 per Each

Minimum Order Quantity (MOQ): 260

Ships within 7 days

Qty	Price
260 - 303	$0.1155
304 - 649	$0.0866
650 - 1298	$0.0693
1299 - 2597	$0.0520
2598 - 5194	$0.0404
5195+	$0.0347

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Product Details

Material	Buna-N
Temperature Range	-40°F to 250°F
Cross Sectional Shape	Round
Hardness	70
Dash	913
Actual (Inch)	ID: 0.986 ± 0.010 CS: 0.116 ± 0.004 OD: 1.218
Actual (Metric)	ID: 25.04 ± 0.26 CS: 2.95 ± 0.10 OD: 30.940

Buna-N (Nitrile) O-rings are made from a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. They are among the most widely used sealing materials due to their excellent resistance to oils, fuels, and many chemicals. Nitrile O-rings provide high mechanical strength, outstanding wear resistance, and good tensile strength, making them ideal for automotive, industrial, and aerospace applications.

Buna-N Recommended Uses

Seals and gaskets, fuel systems, hydraulic systems, oil and gas industry, automotive applications, general-purpose applications.

Buna-N Not Recommended

Brake fluid, ozone, UV exposure, phosphate esters, chlorinated hydrocarbons, aromatic hydrocarbons, ketones, strong acids, atmospheric aging.

Buna-N Limitations

Not suitable for ozone, sunlight, or weathering exposure.
Limited performance in high-temperature environmen.
Not ideal for strong acids and alkalis.
Not recommended for applications requiring low compression set.

Buna-N Usable Temperature Range

-30 to 250°F (-34 to 121°C)

Buna-N Also Known As

Buna-N, Nitrile, NBR, Nitrile Butadiene Rubber.