- Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids from petroleum to aliphatic hydrocarbons
- Durometer (hardness) of 90A for resistance to penetration
- Round cross-section to provide a seal between cylindrical overlapping surfaces
- 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
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Buna O-Ring, 90A Durometer, Round, Black
|Price:||$2.24 - $33.00|
|Brand Name||Small Parts|
|Material Type||Nitrile Rubber|
|Hardness||90 A Durometer|
|System of Measurement||Inch|
|Cross Section Shape||Round|
|LowerTemperature Range||-30 Degrees Fahrenheit|
|Upper Temperature Range||250 Degrees Fahrenheit|
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This O-ring is made of black Buna-nitrile (Buna-N) and has a durometer of 90A. It has a round 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 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 90A. Durometers measure 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, a value of 0 indicates that a sample was completely penetrated, while a value of 100 shows no indentation in the sample. The letter following the number identifies the shore scale, which is either shore A or D. Shore A is used for softer plastics, while shore D is used for harder plastics.
O-rings 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 AS568A dash sizes, which is the standardized sizing for O-rings, and defines the nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter of an O-ring.
Top Customer Reviews
Most Recent Customer Reviews
I used these on a paintball marker where I had been destroying lots of O-rings. These have lasted much longer than the factory rings plus they are significantly cheaper.Published 20 months ago by Sam
Great Heavy Duty O-Rings! The perfect size if your building a Waterzooka PVC Water Gun with a 2" cylinder & 1-3/4" piston.Published 24 months ago by Lyndon
Worked perfectly for my garden hose plastic quick disconnects. It sure beats buying the sets all over or. Read morePublished on July 26, 2014 by CJL
Packaged well and works as expected. Used a belts for my P20 scroll saw since the original ones are impossible to find now. Read morePublished on May 12, 2014 by Scott Walter