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222 Buna O-Ring, 70A Durometer, Black, 1-1/2" ID, 1-3/4" OD, 1/8" Width (Pack of 25)

4.8 out of 5 stars 6 customer reviews

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Specifications for this item
Part Number ORB-222-25
Item Hardness 70A
Measurement System Inch
Cross Section Shape Round
Lower Temperature Rating -30
Upper Temperature Rating 250
Specification Met AS568A
Brand Name Small Parts
Color Black
Durometer Hardness 70A
Inside Diameter 1.484
Inside Diameter Tolerance 0.015
Item Diameter 1.762
Material Nitrile Rubber
Model Number 222
Nominal Inside Diameter 1.484
Nominal Outside Diameter 1-3/4
Nominal Width 0.139
Number of Items 25
Outside Diameter 1-3/4
Size 222
Width 0.139
Width Tolerance 0.004



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Product features

  • 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

Product description

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.


Product details

  • Shipping Weight: 1.6 ounces
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B000FN0WPK
  • Item model number: 222
  • Average Customer Review: 4.8 out of 5 stars 6 customer reviews
  • Amazon Best Sellers Rank: #175,733 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Product Warranty: For warranty information about this product, please click here

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