AS568-389 O-Ring
Standard Aerospace Size O-Ring | SAE AS568B
Dimensions (Imperial)
| Inner Diameter (ID) | 19.955" ±0.007" |
| Cross Section (CS) | 0.21" ±0.005" |
| Outer Diameter (OD) | ~20.375" |
Dimensions (Metric)
| Inner Diameter (ID) | 506.86 mm |
| Cross Section (CS) | 5.33 mm |
| Outer Diameter (OD) | ~517.52 mm |
Tolerance Class
Standard AS568B Class 2 tolerances apply. For critical applications requiring tighter tolerances, specify Class 1 when ordering.
Frequently Asked Questions
What are the dimensions of AS568-389?
AS568-389 has an Inner Diameter (ID) of 19.955" (506.86mm) and Cross Section (CS) of 0.21" (5.33mm).
What materials are available for AS568-389?
Common materials include Nitrile (NBR), Viton (FKM), EPDM, and Silicone. See our material guide for selection help.