• AS568 Buna O-Rings
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.

Polyurethane is also known as urethane, cast urethan and millable urethane. Exceptional tensile strength. Abrasion and low temperature resistance. Typical applications include hydraulic seals, gaskets, diaphragms, hoses, and wheels for skate boards.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
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Cross Section Width (in)

Cross Section Width (mm)

Durometer

Inside Diameter (mm)

Inside Diameter (in)

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IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

Cross Section Tolerance +/-

Inside Diameter Tolerance +/-

Size Reference - AS568

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O-Ring Industries

N/A AS568 Standard O-Rings N/A Polyurethane N/A 0.116 in N/A 90 N/A 0.986 in N/A 0.004 in N/A 0.01 in N/A -913 N/A N/A Imperial N/A 13/16 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A AS568 Standard O-Rings N/A Polyurethane N/A 0.116 in N/A 90 N/A 1.047 in N/A 0.004 in N/A 0.01 in N/A -914 N/A N/A Imperial N/A 7/8 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A AS568 Standard O-Rings N/A Polyurethane N/A 0.116 in N/A 90 N/A 1.171 in N/A 0.004 in N/A 0.01 in N/A -916 N/A N/A Imperial N/A 1 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A AS568 Standard O-Rings N/A Polyurethane N/A 0.116 in N/A 90 N/A 1.355 in N/A 0.004 in N/A 0.012 in N/A -918 N/A N/A Imperial N/A 1-1/8 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A AS568 Standard O-Rings N/A Polyurethane N/A 0.118 in N/A 90 N/A 1.475 in N/A 0.004 in N/A 0.014 in N/A -920 N/A N/A Imperial N/A 1-1/4 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A AS568 Standard O-Rings N/A Polyurethane N/A 0.118 in N/A 90 N/A 1.720 in N/A 0.004 in N/A 0.014 in N/A -924 N/A N/A Imperial N/A 1-1/2 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A AS568 Standard O-Rings N/A Polyurethane N/A 0.118 in N/A 90 N/A 2.090 in N/A 0.004 in N/A 0.018 in N/A -928 N/A N/A Imperial N/A 1-3/4 N/A N/A O-rings are used in the military defense and agriculture industries.
N/A AS568 Standard O-Rings N/A Polyurethane N/A 0.118 in N/A 90 N/A 2.337 in N/A 0.004 in N/A 0.018 in N/A -932 N/A N/A Imperial N/A 2 N/A N/A O-rings are used in the military defense and agriculture industries.
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