AS568-212 Buna-N 70 Duro Black X-Ring for 7/8 ID X 1/8 CS

Buna-N X-Rings 70 Duro Black BN700100-X-212

$ 0.4779 per Each

Minimum Order Quantity (MOQ): 63

Ships within 14 days

Qty	Price
63 - 73	$0.4779
74 - 159	$0.3584
157 - 313	$0.3106
314 - 627	$0.2628
628+	$0.2342

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	212
Fractional	ID: 7/8 CS: 1/8 OD: 1-1/8
Actual (Inch)	ID: 0.859 ± 0.010 CS: 0.139 ± 0.004 OD: 1.137
Actual (Metric)	ID: 21.82 ± 0.25 CS: 3.53 ± 0.10 OD: 28.880

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.