Cross reference
AS568-121 O-Ring Cross Reference
Nominal AS568 dimensions compared with the closest entries in the currently verified JIS B 2401 P and ISO 3601-1 datasets.
AS568 ID26.640 mm
Cross-section2.620 mm
AS568 OD31.880 mm
Closest dimensional entries
| Standard | Size | ID | CS | OD | ID Δ | CS Δ |
|---|---|---|---|---|---|---|
| ISO 3601-1 | ISO 023 | 26.70 | 1.78 | 30.26 | 0.06 | 0.84 |
| JIS B 2401 | P-27 | 26.70 | 3.50 | 33.70 | 0.06 | 0.88 |
| JIS B 2401 | P-26 | 25.70 | 3.50 | 32.70 | 0.94 | 0.88 |
| JIS B 2401 | P-25.5 | 25.20 | 3.50 | 32.20 | 1.44 | 0.88 |
| JIS B 2401 | P-28 | 27.70 | 3.50 | 34.70 | 1.06 | 0.88 |
| ISO 3601-1 | ISO 024 | 28.30 | 1.78 | 31.86 | 1.66 | 0.84 |
| JIS B 2401 | P-25 | 24.70 | 3.50 | 31.70 | 1.94 | 0.88 |
| ISO 3601-1 | ISO 022 | 25.12 | 1.78 | 28.68 | 1.52 | 0.84 |
| JIS B 2401 | P-29 | 28.70 | 3.50 | 35.70 | 2.06 | 0.88 |
| JIS B 2401 | P-24 | 23.70 | 3.50 | 30.70 | 2.94 | 0.88 |
These are dimensional comparisons, not automatic standards equivalence or interchangeability recommendations.
Check your groove
Use the AS568 size with the Groove Design Check to review your actual groove dimensions.
Groove Design Check