AS568-336 Buna-N 90 Duro Black O-Ring for 2-7/8 ID X 3/16 CS

Buna-N O-Rings 90 Duro Black BN900100-336

$ 1.09 per Each

Minimum Order Quantity (MOQ): 50

On Backorder

Material	Buna-N
Cross Sectional Shape	Round
Hardness	90
Dash	336
Fractional	ID: 2-7/8 CS: 3/16 OD: 3-1/4
Actual (Inch)	ID: 2.850 ± 0.020 CS: 0.210 ± 0.005 OD: 3.270
Actual (Metric)	ID: 72.39 ± 0.51 CS: 5.33 ± 0.13 OD: 83.050

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.