AS568-118 Buna-N 70 Duro Black O-Ring for 7/8 ID X 3/32 CS

Buna-N O-Rings 70 Duro Black BN700100-118

$ 0.0847 per Each

Minimum Order Quantity (MOQ): 355

Ships within 7 days

Qty	Price
355 - 413	$0.0847
414 - 885	$0.0635
886 - 1770	$0.0508
1771 - 3541	$0.0381
3542 - 7083	$0.0296
7084+	$0.0254

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
Temperature Range	-40°F to 250°F
Cross Sectional Shape	Round
Hardness	70
Dash	118
Fractional	ID: 7/8 CS: 3/32 OD: 1-1/16
Actual (Inch)	ID: 0.862 ± 0.010 CS: 0.103 ± 0.003 OD: 1.068
Actual (Metric)	ID: 21.89 ± 0.25 CS: 2.62 ± 0.08 OD: 27.130

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.