SAE AS568 Aerospace size standard for O-rings
CurrentLatest edition found. Still confirm amendments with the publisher.
- Edition
- AS568F (2020, reaffirmed 2026)
- Publisher
- SAE
- Part family
- Seals & O-rings
- Reviewed
- 27 October 2026 · source checked
Is SAE AS568 still current?
Yes. AS568F (2020, reaffirmed 2026) is the latest edition MechAtlas found (MechAtlas review: 27 October 2026). Check the publisher for amendments before you specify it.
What it covers
Inch O-ring sizes with dash numbers, any elastomer.
Parts that use SAE AS568
- O-ring (USA (ASME / ASTM), main)
Round-section rubber ring in a groove that seals static or slow-moving joints in hydraulic, pneumatic and pump parts.
AS568-xxx (dash number)
Grades: Dash number
Inch size standard, revision F.
Official source
MechAtlas does not reproduce standards. Check the official edition at the publisher's page for SAE AS568 or the SAE store.
Open in MechAtlasCheck a drawing callout
Other seals & o-rings standards
- DIN 3771-1 Replaced
Fluid systems - O-rings - dimensions - IS 5129 (Part 1) Replaced
Rotary shaft lip type seals - nominal dimensions and tolerances - IS 9975 (Part 1) Replaced
Specification for O-rings - dimensions - API 682 Current
Pump shaft sealing systems - ARPM OS-4 Current
Application guide for radial lip type shaft seals - DIN 3760 Current
Rotary shaft lip seals, types A/AS - DIN 3761 Current
Lip seals, automotive/heavy duty types - DIN ISO 3601-1 Current
O-rings - part 1 (ISO 3601-1:2012 + Amd 1:2019) - EN 12756 Current
Mechanical seal principal dimensions (ex DIN 24960) - IS 17891 Current
Fluid power systems - O-rings (parts 1 to 5) - IS/ISO 6194-1 Current
Rotary shaft lip seals - nominal dimensions and tolerances - ISO 21049 Current
Pump shaft sealing systems