AS568-144 Buna-N 90 Duro Black O-Ring for 2-1/2 ID X 3/32 CS

Buna-N O-Rings 90 Duro Black BN900100-144

$ 0.354 per Each

Minimum Order Quantity (MOQ): 85

Ships within 14 days

Qty	Price
85 - 98	$0.3540
99 - 211	$0.2655
212 - 423	$0.2124
424 - 847	$0.1593
848 - 1694	$0.1239
1695+	$0.1062

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Product Details

Material	Buna-N
Temperature Range	-40°F to 250°F
Cross Sectional Shape	Round
Hardness	90
Dash	144
Fractional	ID: 2-1/2 CS: 3/32 OD: 2-11/16
Actual (Inch)	ID: 2.487 ± 0.020 CS: 0.103 ± 0.003 OD: 2.693
Actual (Metric)	ID: 63.17 ± 0.51 CS: 2.62 ± 0.08 OD: 68.410

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.