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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.
Rem
Reviewed in the United States on January 22, 2025
Perfect fit for my old, military type jerrycans. Doesn't cover vent hole but good seal that prevents cap leakage
Deb
Reviewed in the United States on July 31, 2024
Bought these O rings in hopes that they would work for a vintage Chinon film projector and the work great. The projector has been rolling film and I haven’t noticed any difference in performance.
Edwin S. Jacobs
Reviewed in the United States on May 13, 2016
It didn't do what I bought it for. I have several coffee tumblers that tend to dribble because the gasket is compressed and I was hoping the O ring would solve the problem. It didn't.
Jerry
Reviewed in the United States on March 22, 2016
This O-ring is being used as part of a campaign to reduce my ceiling fan's noise. I've glued this O-ring to the dome cap with cyanoacrylate adhesive. this provides an elastoner vibration damper between the cap and dome. I've also incorporated a smaller O-ring to isolate the finial from the dome cap. Going forward, I've added a elastomer washer and a small O-ring to isolate the dome from the check washer in an ongoing project to isolate the dome from fan vibrations. I can now confidently write that the project is complete and the project is no longer going forward. and is definitely no longer ongoing, save for future replacement of components reaching the end of their life.Oh, and yes, the project was a success.
Mike M
Reviewed in the United States on March 13, 2014
I needed new O rings for my 20" Centerline Archer IIs and could not see paying what Centerline wanted for them. These are a perfect fit once you wrestle them on. Just remember to use a bit of oil when seating the center cap to the wheel.
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