AS568-438 Buna-N 70 Duro Black FDA O-Ring for 6-1/4 ID X 1/4 CS

Buna-N O-Rings 70 Duro Black FDA BN700101-438

$ 5.15 per Each

Minimum Order Quantity (MOQ): 10

Out of stock

Material	Buna-N
Cross Sectional Shape	Round
Hardness	70
Dash	438
Fractional	ID: 6-1/4 CS: 1/4 OD: 6-3/4
Actual (Inch)	ID: 6.225 ± 0.040 CS: 0.275 ± 0.006 OD: 6.775
Actual (Metric)	ID: 158.12 ± 1.02 CS: 6.99 ± 0.15 OD: 172.100

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).