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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.
moe
2025-08-31 10:38:11
great product
Larry Wayne Hutcherson Sr
2025-08-24 13:07:05
Instead of buying a 2 pack of P6119 O-Rings for my pool filter, I bought this pack of 10 for about half the price. These work perfectly. No fuss at all. It went on easily, and seals perfectly,.I'm very happy to get 10 O-Rings for a lot cheaper than the pack of 2 OEM P6119 O-Rings.Highly recommended.
Peterpiper
2025-08-15 13:37:54
Great ‘O’ rings perfect for my MGB DCOE manifold spacers
I-wa
2025-06-16 15:41:14
Using there for duck call sound boards. Correct size. Happy so far.
justin t.
2025-05-31 18:27:40
Solid, strong, not very flexible.
Katy
2025-05-30 14:24:28
Works great
Joe User
2025-05-09 11:11:42
Was Just as advertised
Stephanie
2025-04-24 12:41:47
I wanted them for a non standard use, gem jars in a display in which they were loose. They went on perfectly, but after a few weeks the least pressure makes some of them fall off, so I won't be ordering more
serge comeau
2025-03-25 11:49:50
tres mauvaise qualité , surement du chinois
pat
2025-03-24 11:53:48
Thickness is advertised as 0.125". They are actually 0.139" so not the size i ordered.
pat
2025-03-12 13:09:35
The item showed up on time but was not the size advertised.The thickness was advertised as 0.125" and the o ring is actually 0.139" not suitable for the purpose i needed.
Customer
2025-02-18 18:17:57
Looks ideal for what I need but a smaller pack would have been nice.
black bahart
2025-02-04 17:56:04
fits correctly for the smaller O ring 1/2" coupler
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