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Your cart is empty.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.
KL
Reviewed in Canada on November 23, 2021
Only needed one to fix the leaky pump of the hydraulic floor jack, gave five to a friend with the same floor jack.
ed nakamura
Reviewed in the United States on May 28, 2017
Sent my hpa regulator because it was leaking , for warranty. They replaced 1 and sent me 5, why. Then 0ring was soft compared to the 90 durometer. .
Leo Jablonski
Reviewed in Canada on May 16, 2017
The price for these was very low! I bought then for a scuba operation in Cuba. They go through o-rings faster than they can get them and I'm repaid in diving services.
CJL
Reviewed in the United States on July 27, 2014
Worked perfectly for my garden hose plastic quick disconnects. It sure beats buying the sets all over or. For just pennies, I can breath new life into the plethora of quick-disconnects around my yard. I fear I'd have to buy expensive brass fittings to get reasonable life from garden hose quick disconnects. Now, I've doubled their life for a couple of bucks and I have tons to spare. If you are in the same boat, you've GOT to get these.
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