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Buna O-Ring, 70A Durometer, Round, Black

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Product Specifications
Material Type
Nitrile Rubber
Color Name
Black
Brand Name
Small Parts
Cross Section Shape
Round
Upper Temperature Range
250  Degrees Fahrenheit
Specification Met
AS568A
Hardness
70 A Durometer
UNSPSC Code
31410000
LowerTemperature Range
-30  Degrees Fahrenheit
System of Measurement
Inch

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Price  
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Currently showing 1-20 of 706 Next 20 »
001 1/32" 3/32" 1/32" 0.029" 0.109" 0.04" 100 B000FMUESQ yes $2.01 Buy Options
001-1/2 1/16" 1/8" 1/32" 0.070" 0.150" 0.040" 100 B005282S4G yes $6.38 Buy Options
002 3/64" 9/64" 3/64" 0.042" 0.142" 0.05" 100 B000FMUETU yes $1.94 Buy Options
003 1/16" 3/16" 1/16" 0.056" 0.176" 0.06" 100 B000FN0UTS yes $2.01 Buy Options
004 5/64" 13/64" 1/16" 0.07" 0.21" 0.07" 100 B000FMURGK yes $4.09 Buy Options
005 3/32" 7/32" 1/16" 0.101" 0.241" 0.07" 100 B000FN0UXY yes $3.67 Buy Options
006 1/8" 1/4" 1/16" 0.114" 0.254" 0.07" 100 B000FN0V06 yes $3.80 Buy Options
007 5/32" 9/32" 1/16" 0.145" 0.285" 0.07" 100 B000FMWLPK yes $4.28 Buy Options
008 3/16" 5/16" 1/16" 0.176" 0.316" 0.07" 100 B000FMWLR8 yes $2.08 Buy Options
009 7/32" 11/32" 1/16" 0.208" 0.348" 0.07" 100 B000FMYOG4 yes $4.26 Buy Options
010 1/4" 3/8" 1/16" 0.239" 0.379" 0.07" 100 B000FN0V6A yes $4.31 Buy Options
011 5/16" 7/16" 1/16" 0.301" 0.441" 0.07" 100 B000FMYOK0 yes $4.74 Buy Options
012 3/8" 1/2" 1/16" 0.364" 0.504" 0.07" 100 B000FMWLW8 yes $10.71 Buy Options
013 7/16" 9/16" 1/16" 0.426" 0.566" 0.07" 100 B000FMYONC yes $2.76 Buy Options
014 1/2" 5/8" 1/16" 0.489" 0.629" 0.07" 100 B000FN0VCY yes $2.87 Buy Options
015 9/16" 11/16" 1/16" 0.551" 0.691" 0.07" 100 B000FMWM1I yes $3.30 Buy Options
016 5/8" 3/4" 1/16" 0.614" 0.754" 0.07" 100 B000FMYOSC yes $3.83 Buy Options
017 11/16" 13/16" 1/16" 0.676" 0.816" 0.07" 100 B0051XXWEC yes $4.09 Buy Options
018 3/4" 7/8" 1/16" 0.739" 0.879" 0.07" 100 B000FMWM5E yes $3.53 Buy Options
019 13/16" 15/16" 1/16" 0.801" 0.941" 0.07" 100 B0051XXWPQ yes $5.61 Buy Options

Key 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.

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