326 Buna-N O-Ring, 70A Durometer, Square, Black, 1-5/8" ID, 2" OD, 3/16" Width (Pack of 25)

Key features

• Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids from petroleum to aliphatic hydrocarbons
• Durometer (hardness) of 70A for resistance to penetration
• Square cross-section to provide a static seal under high pressure
• For use across a wide temperature range from -30 degrees F/-34 degrees C to 250 degrees F/121 degrees C
• Meets standards defined by Aerospace Standard AS568A

This O-ring is made of black Buna-nitrile (Buna-N) and has a durometer of 70A. It has a square cross-section and can be used across a wide temperature range (-30 degrees F/-34 degrees C to 250 degrees F/121 degrees C). Designed for use in a wide variety of sealing applications, this square O-ring can provide a superior seal to round O-rings in static applications, but is usually not as effective in dynamic applications. This Buna-nitrile O-ring meet standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings. Buna-nitrile can have high tensile strength, and has abrasion, tear, and compression set resistance. It is compatible for use with petroleum, hexafluoroacetone (HFA), hexafluoro-2-butyne (HFB) and hydrofluorocarbon (HFC) fluids, vegetable oil, alcohol, acids, and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering, and should not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light. The durometer hardness of this Buna O-ring is 70A. Durometers measure the hardness of a material and its resistance to permanent indentation. A hig

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