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This O-ring is made of black Buna-nitrile, is round in cross-section, has a durometer of 70A, and is designed for use in a wide variety of sealing applications.
Buna-nitrile can have high tensile strength, and abrasion, tear, and compression set resistance. It can be used in temperatures between -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C), and is compatible for use with petroleum, HFA, HFB and HFC fluids, vegetable oil, alcohol, acids and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.
This Buna O-ring has a shore durometer of 70A. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation.
O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section, and a hole in the center, similar to a doughnut. O-rings are available in various sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter.
These Buna-nitrile O-rings meet standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings.
Tony Ledford
Reviewed in the United States on April 21, 2024
At 70A they stretch great for prop savers on Foamy rc planes. Was able to stretch two of them on my prop. Good quality o-ring. I bought three sizes for different sizes of props.
tool*guy
Reviewed in the United States on August 14, 2020
Good product for the money
DANILO G DE JESUS
Reviewed in the United States on October 19, 2018
I really like the product. Very cheap compared to original product. I recommended them to several friends who use the same product.
robert d. humphrey
Reviewed in the United States on December 5, 2017
Too, thick for what I need.
Geran R Brown
Reviewed in the United States on April 24, 2016
Used this to rebuild my WRX power steering pump.
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