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: Aerospace Standard 568 Dash Number, Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

Unit of Measure

Inside Diamter

N/A 1.42 mm0.056 in

Cross Section Width

N/A 0.060 in1.52 mm

Size Reference - AS568

N/A -003

Inside Diameter Tolerance +/-

N/A 0.004 in0.10 mm

Cross Section Tolerance +/-

N/A 0.003 in0.08 mm


N/A AS568 Standard O-Ring




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.

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