20 PK AS-237 Buna-N O-Ring, 70A 3-3/8" ID, 3-5/8" OD, 1/8" Width, Black

Key features

• Made from Buna-Nitrile (Buna-N), suitable for use with various fluids, hydrocarbons, oils, fuels, and hydraulic applications.
• Suitable for a broad temperature range, from -30°F (-34°C) to 250°F (121°C)
• Designed with a round cross-section to ensure a secure seal between overlapping cylindrical surfaces.
• Durometer (hardness) of 70A for resistance to penetration
• Complies with Aerospace Standard AS568A.
• Actual ID: 3.359", Actual CS: 0.139", Actual OD: 3.637"

This O-ring is crafted from black Buna-nitrile, featuring a round cross-section and a durometer rating of 70A, making it suitable for a broad range of sealing applications.Buna-nitrile offers high tensile strength along with excellent resistance to abrasion, tearing, and compression set. It operates effectively within a temperature range of -30°F (-34°C) to 250°F (121°C) and is compatible with various fluids, including petroleum, HFA, HFB, HFC fluids, vegetable oils, alcohols, acids, and aliphatic hydrocarbons. However, it is sensitive to acetone, ethers, esters, ozone, sunlight, and weathering, so it should not be used in ozone-generating electric motors, welding equipment, or environments exposed to UV light.With a shore durometer of 70A, this Buna O-ring indicates a specific hardness level and its resistance to permanent indentation. A higher durometer value reflects greater resistance to indentation, with the scale ranging from 0 to 100, where 100 means no indentation occurs.O-rings are typically employed to create pressure and fluid seals between overlapping cylindrical surfaces. They are commonly found in applications like engines, faucets, flanges, valves, and various cylind

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