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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.
Unit of Measure

Specifications

Type

 N/A AS568 Standard O-Rings

Material

 N/A PTFE

Cross Section Width

 N/A 0.064 in

Durometer

 N/A 75

Inside Diameter

 N/A 0.239 in

Cross Section Tolerance +/-

 N/A 0.003 in

Inside Diameter Tolerance +/-

 N/A 0.005 in

Size Reference - AS568

 N/A -902

Units of Measure

 N/A Imperial

Tube Size O.D.

 N/A 1/8

O-Ring Industries

 N/A O-rings are used in the military, automotive, aerospace and agriculture industries.