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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

Cross Section Width

 N/A 0.070 in1.78 mm

Inside Diameter

 N/A 2.57 mm0.101 in

Cross Section Tolerance +/-

 N/A 0.003 in0.08 mm

Inside Diameter Tolerance +/-

 N/A 0.005 in0.12 mm

Size Reference - AS568

 N/A -005

Warning

 N/A Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.

O-Ring Industries

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