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211 Buna-N O-Ring, 70A Durometer, Black, 13/16' ID, 1-1/16' OD, 1/8' Width (Pack of 100)

Free shipping on orders over CA $49.99

CA $12.15

CA $ 5 .99 CA $5.99

In Stock

About this item

  • Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids and hydrocarbons
  • Can be used across a wide temperature range from -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C)
  • Round in cross-section to provide a seal between cylindrical overlapping surfaces
  • Durometer (hardness) of 70A for resistance to penetration
  • Meets standards defined by Aerospace Standard AS568A


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.


Reader
Reviewed in the United States on September 25, 2024
These rubber o-rings are used customer returns and were resold as new via tag LPN RR HZ9092867.
Uncle Matt.
Reviewed in Canada on June 7, 2023
Just got to get them into different temperature situations to see how they handle varying temperatures.
Customer
Reviewed in Canada on October 11, 2019
all good
Elizabeth Ellis
Reviewed in the United States on January 5, 2019
Thickness is 9/64” not 1/8” as represented. Email question went unanswered
Sinbad
Reviewed in the United States on March 20, 2015
Simply the best value for this product. Only If I can remember where I put the remaining 97 o-rings!!!!!!!!:(
sr1sws
Reviewed in the United States on October 11, 2014
Great value pack. I purchased these to use as a hammer buffer in my air rifle.
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