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.
This elastomer possesses mechanical properties similar to Viton®, with the exception of its slightly lower compression set resistance. It is more suitable for sensitive applications where lighter compressive forces are applied to energize the seal. This core has a Shore A hardness of 70 but it also offers a broader operating temperature range of -80°F to +500°F. (-62°C to +260°C).
This elastomer possesses mechanical properties similar to Viton®, with the exception of its slightly lower compression set resistance. It is more suitable for sensitive applications where lighter compressive forces are applied to energize the seal. This core has a Shore A hardness of 70 but it also offers a broader operating temperature range of -80°F to +500°F. (-62°C to +260°C).
Unit of Measure
Type |
N/A AS568 Standard O-Rings |
Material |
N/A Fluorosillicone |
Cross Section Width |
N/A 0.097 in |
Durometer |
N/A 75 |
Inside Diameter |
N/A 0.706 mm0.706 in |
Cross Section Tolerance +/- |
N/A 0.003 in |
Inside Diameter Tolerance +/- |
N/A 0.009 in |
Size Reference - AS568 |
N/A -909 |
Units of Measure |
N/A Imperial |
Tube Size O.D. |
N/A 9/16 |
O-Ring Industries |
N/A O-rings are used in the military, automotive, aerospace and agriculture industries. |