Concise Title: 222 Buna/Nitrile O-Rings, 70A Durometer, Black, 1-1/2 ID, 1-3/4 OD, 1/8 Width (Pack of 5)

This round Buna-nitrile O-ring is designed for a wide variety of sealing applications. Buna-nitrile, also known as Buna-N, is a versatile material that offers high tensile strength, as well as abrasion, tear, and compression set resistance. The O-ring has a durometer of 70A, which indicates its resistance to permanent indentation on a scale of 0 to 100, with 100 representing no indentation.

The O-ring is compatible with a range of fluids and hydrocarbons, including petroleum, HFA, HFB and HFC fluids, vegetable oil, alcohol, acids, and aliphatic hydrocarbons. It can be used in temperatures ranging from -30 degrees Fahrenheit (-34 degrees Celsius) to 250 degrees Fahrenheit (121 degrees Celsius).

However, Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight, and weathering, and should not be used in applications with exposure to these elements, such as ozone-generating electric motors, welding equipment, or UV light.

The O-ring meets the standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings. Its dimensions are as follows: Nominal inside diameter (ID) of 1-1/2, nominal outer diameter (OD) of 1-3/4, and nominal cross-sectional (CS) diameter of 1/8.

These versatile Buna-nitrile O-rings perform well in a variety of applications, including petroleum-based oils and fuels, aliphatic hydrocarbons, vegetable oils, silicone oils and greases, ethylene glycol, dilute acids, and water at temperatures below 100 degrees Celsius (212 degrees Fahrenheit).

The O-ring has a shelf-life of 15 years and is designed to provide a secure pressure and fluid seal between cylindrically shaped, overlapping mating surfaces, such as those found in engines, faucets, flanges, valves, and various cylinders. The circular shape and round cross-section of the O-ring, with a hole in the center, is similar to a doughnut, and it is available in various sizes to meet specific application requirements.

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