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AS568 Spec Table
AS568 Specifications — 9 sizes
AS568
AS568-standard O-rings used in North American equipment, sized by ID (inner diameter) and CS (cross-section).
Practical Notes
- Not interchangeable with JIS series. Use only for US equipment maintenance; specify JIS for new domestic designs.
- 369 standard sizes available. Specify by ID (inner diameter) and CS (cross-section diameter).
Selection Guide
Inch-based O-ring standard for US equipment, aircraft, and semiconductor systems. Not interchangeable with JIS series. 369 standard sizes. Use only for US-origin equipment maintenance.
AS568AS568
9 sizes| Nominal | ID | CS | Use | Standard | - |
|---|---|---|---|---|---|
| AS568-010 | 6.07 | 1.78 | General | AS568 | - |
| AS568-012 | 9.19 | 1.78 | General | AS568 | - |
| AS568-014 | 12.42 | 1.78 | General | AS568 | - |
| AS568-016 | 15.54 | 1.78 | General | AS568 | - |
| AS568-110 | 7.65 | 2.62 | General | AS568 | - |
| AS568-113 | 13.94 | 2.62 | General | AS568 | - |
| AS568-116 | 20.22 | 2.62 | General | AS568 | - |
| AS568-210 | 22.22 | 3.53 | General | AS568 | - |
| AS568-214 | 31.47 | 3.53 | General | AS568 | - |
Key Features
- US SAE/AS568A numbering; inch-based ID and cross-section combinations totaling 369 sizes
- Cross-section (CS) 1/16"–1/4" (1.78–6.99 mm); ID range 0.029"–26.000"
- Essential for US-origin equipment/hydraulics maintenance; dimensions incompatible with JIS series
Key Applications
US hydraulic equipment, aircraft hydraulic systems, semiconductor vacuum seals, oil & gas valves, defense equipment
FAQ
Are AS568 O-rings compatible with JIS?
No. Inch-based and millimeter-based dimension systems are completely different. Use AS568 only for US equipment maintenance.