AS568-336 Buna-N 70 Duro Black X-Ring for 2-7/8 ID X 3/16 CS

Buna-N X-Rings 70 Duro Black BN700100-X-336

$ 2.63 per Each

Minimum Order Quantity (MOQ): 12

Ships within 14 days

Qty	Price
12 - 13	$2.6300
14 - 28	$1.9725
29 - 57	$1.7095
58 - 114	$1.4465
115 - 228	$1.1835
229+	$1.1400

Ordering in large quantities? Ask for a lead time quote — we'll get back to you with pricing and lead time.

Product Details

Material	Buna-N
Cross Sectional Shape	X
Hardness	70
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) X-rings, also known as Quad-rings, are a type of sealing element designed to provide superior sealing performance in dynamic applications. These rings have a unique square cross-section with four contact points, offering better sealing efficiency and lower friction compared to traditional O-rings. Made from a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene, Buna-N X-rings offer excellent resistance to oils, fuels, and a variety of chemicals, making them ideal for a wide range of industrial, automotive, and aerospace applications.

Buna-N X-Ring Recommended Uses

Seals and gaskets in hydraulic systems, automotive fuel systems, industrial machinery, high-pressure applications, dynamic sealing applications, and rotary sealing applications.

Buna-N X-Ring Not Recommended

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

Buna-N X-Ring Limitations

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

Buna-N X-Ring Usable Temperature Range

-30 to 250°F (-34 to 121°C)

Buna-N X-Ring Also Known As

Buna-N X-Ring, Quad-Ring, Nitrile X-Ring, NBR X-Ring, Nitrile Butadiene Rubber X-Ring.