Cross reference
AS568-018 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 ID18.770 mm
Cross-section1.780 mm
AS568 OD22.330 mm
Closest dimensional entries
| Standard | Size | ID | CS | OD | ID Δ | CS Δ |
|---|---|---|---|---|---|---|
| ISO 3601-1 | ISO 018 | 18.77 | 1.78 | 22.33 | 0.00 | 0.00 |
| JIS B 2401 | P-19 | 18.80 | 2.40 | 23.60 | 0.03 | 0.62 |
| JIS B 2401 | P-18 | 17.80 | 2.40 | 22.60 | 0.97 | 0.62 |
| JIS B 2401 | P-20 | 19.80 | 2.40 | 24.60 | 1.03 | 0.62 |
| ISO 3601-1 | ISO 019 | 20.35 | 1.78 | 23.91 | 1.58 | 0.00 |
| ISO 3601-1 | ISO 017 | 17.17 | 1.78 | 20.73 | 1.60 | 0.00 |
| JIS B 2401 | P-17 | 16.80 | 2.40 | 21.60 | 1.97 | 0.62 |
| JIS B 2401 | P-21 | 20.80 | 2.40 | 25.60 | 2.03 | 0.62 |
| JIS B 2401 | P-16 | 15.80 | 2.40 | 20.60 | 2.97 | 0.62 |
| ISO 3601-1 | ISO 016 | 15.60 | 1.78 | 19.16 | 3.17 | 0.00 |
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