AS568-161 Buna-N 70 Duro Black FDA O-Ring for 5-1/2 ID X 3/32 CS

Buna-N O-Rings 70 Duro Black FDA BN700101-161

$ 0.9245 per Each

Minimum Order Quantity (MOQ): 33

Ships within 10 days

Qty	Price
33 - 37	$0.9245
38 - 81	$0.6934
82 - 162	$0.5547
163 - 324	$0.4160
325+	$0.3467

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	161
Fractional	ID: 5-1/2 CS: 3/32 OD: 5-11/16
Actual (Inch)	ID: 5.487 ± 0.035 CS: 0.103 ± 0.003 OD: 5.693
Actual (Metric)	ID: 139.37 ± 0.89 CS: 2.62 ± 0.08 OD: 144.610

FDA-approved Buna-N (Nitrile) O-rings are made from a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene, specially formulated to meet the Food and Drug Administration (FDA) requirements for food contact applications. These O-rings offer excellent resistance to oils, fuels, and many chemicals while being compliant with FDA regulations for safe use in food processing, pharmaceutical, and medical industries. FDA Buna-N O-rings provide high mechanical strength, outstanding wear resistance, and good tensile strength, making them ideal for sanitary applications.

FDA Buna-N Recommended Uses

Seals and gaskets for food and beverage processing, pharmaceutical applications, medical devices, sanitary sealing applications, food handling equipment, and laboratory applications.

FDA Buna-N Not Recommended

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

FDA Buna-N 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.

FDA Buna-N Usable Temperature Range

-30 to 250°F (-34 to 121°C)

FDA Buna-N Also Known As

FDA Buna-N, Nitrile, NBR, Nitrile Butadiene Rubber (FDA Compliant).