AS568-234 Buna-N 90 Duro Black O-Ring for 3 ID X 1/8 CS

Buna-N O-Rings 90 Duro Black BN900100-234

$ 0.476 per Each

Minimum Order Quantity (MOQ): 64

Ships within 14 days

Qty	Price
64 - 73	$0.4760
74 - 157	$0.3570
158 - 315	$0.2856
316 - 630	$0.2142
631+	$0.1749

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Product Details

Material	Buna-N
Temperature Range	-40°F to 250°F
Cross Sectional Shape	Round
Hardness	90
Dash	234
Fractional	ID: 3 CS: 1/8 OD: 3-1/4
Actual (Inch)	ID: 2.984 ± 0.024 CS: 0.139 ± 0.004 OD: 3.262
Actual (Metric)	ID: 75.79 ± 0.61 CS: 3.53 ± 0.10 OD: 82.850

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.