Standard O-Rings are available in 369 sizes as set up by the Aerospace Standard 568 published by the Society of Automotive Engineers. These sizes are designated by dash numbers shown on the 568 DASH Chart and are standardized by imperial dimensions. Standard O-Rings are specified by their inside diameter and cross section width. AS568 is the most commonly used standard in the U.S. for aerospace, automotive and general industrial applications. For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart. Buna is also known as: Nitrile, NBR, N, Buna-N.

Nitrile, chemically, is a copolymer of butadiene and acrylonitrile. Acrylonitrile content is varied in commercial products from 18% to 48%. As the nitrile content increases, resistance to petroleum base oils and hydrocarbon fuels increases, but low temperature flexibility decreases.

Due to its excellent resistance to petroleum products, and its ability to be compounded for service over a temperature range of -65 to +275°F(-54 to +135°C), nitrile is the most widely used elastomer in the seal industry today.

Inherently nitrile does not possess good resistance to ozone, sunlight or weather, but this can be substantially improved through compounding.
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Cross Section Width (in)

Durometer

Inside Diameter (in)

Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

Cross Section Tolerance +/-

Inside Diameter Tolerance +/-

Size Reference - AS568

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Units of Measure

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O-Ring Industries

N/A
189924
N/A N/A N/A 0.103 in N/A 90 N/A 2.175 in N/A 0.003 in0.08 mm N/A 0.017 in0.43 mm N/A -139 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189925
N/A N/A N/A 0.103 in N/A 70 N/A 2.237 in N/A 0.003 in0.08 mm N/A 0.017 in0.43 mm N/A -140 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189926
N/A N/A N/A 0.103 in N/A 90 N/A 2.237 in N/A 0.003 in0.08 mm N/A 0.017 in0.43 mm N/A -140 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189927
N/A N/A N/A 0.103 in N/A 70 N/A 2.300 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -141 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189928
N/A N/A N/A 0.103 in N/A 90 N/A 2.300 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -141 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189929
N/A N/A N/A 0.103 in N/A 70 N/A 2.362 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -142 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189930
N/A N/A N/A 0.103 in N/A 90 N/A 2.362 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -142 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189931
N/A N/A N/A 0.103 in N/A 70 N/A 2.425 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -143 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189932
N/A N/A N/A 0.103 in N/A 90 N/A 2.425 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -143 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189933
N/A N/A N/A 0.103 in N/A 70 N/A 2.487 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -144 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189934
N/A N/A N/A 0.103 in N/A 90 N/A 2.487 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -144 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189935
N/A N/A N/A 0.103 in N/A 70 N/A 2.550 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -145 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189936
N/A N/A N/A 0.103 in N/A 90 N/A 2.550 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -145 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189937
N/A N/A N/A 0.103 in N/A 70 N/A 2.612 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -146 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189938
N/A N/A N/A 0.103 in N/A 90 N/A 2.612 in N/A 0.003 in0.08 mm N/A 0.020 in0.50 mm N/A -146 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189939
N/A N/A N/A 0.103 in N/A 70 N/A 2.675 in N/A 0.003 in0.08 mm N/A 0.022 in0.55 mm N/A -147 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189940
N/A N/A N/A 0.103 in N/A 90 N/A 2.675 in N/A 0.003 in0.08 mm N/A 0.022 in0.55 mm N/A -147 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189941
N/A N/A N/A 0.103 in N/A 70 N/A 2.737 in N/A 0.003 in0.08 mm N/A 0.022 in0.55 mm N/A -148 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189942
N/A N/A N/A 0.103 in N/A 90 N/A 2.737 in N/A 0.003 in0.08 mm N/A 0.022 in0.55 mm N/A -148 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189943
N/A N/A N/A 0.103 in N/A 70 N/A 2.800 in N/A 0.003 in0.08 mm N/A 0.022 in0.55 mm N/A -149 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189944
N/A N/A N/A 0.103 in N/A 90 N/A 2.800 in N/A 0.003 in0.08 mm N/A 0.022 in0.55 mm N/A -149 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189945
N/A N/A N/A 0.103 in N/A 70 N/A 2.862 in N/A 0.003 in0.08 mm N/A 0.022 in0.55 mm N/A -150 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189946
N/A N/A N/A 0.103 in N/A 90 N/A 2.862 in N/A 0.003 in0.08 mm N/A 0.022 in0.55 mm N/A -150 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189947
N/A N/A N/A 0.103 in N/A 70 N/A 2.987 in N/A 0.003 in0.08 mm N/A 0.024 in0.61 mm N/A -151 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
N/A
189948
N/A N/A N/A 0.103 in N/A 90 N/A 2.987 in N/A 0.003 in0.08 mm N/A 0.024 in0.61 mm N/A -151 N/A N/A N/A N/A N/A O-rings are used in the military defense and agriculture industries.
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