O-Rings
Metric O-Rings — Standard & Custom Metric Sizes
FITCO manufactures metric O-Rings across the standard round-metric cross-section ladder (1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 10.0mm) in any ID from 1mm upwards. Metric O-Rings are the standard format for European, Indian and most global engineering drawings outside the United States. Special metric sizes (non-standard ID or CS) are made to drawing.
| Cross-Section | CS (mm) | Typical ID Range |
|---|---|---|
| 1.0 mm CS | 1.0 mm | 1.0–100.0 mm+ |
| 1.5 mm CS | 1.5 mm | 1.5–200.0 mm+ |
| 2.0 mm CS | 2.0 mm | 2.0–300.0 mm+ |
| 2.5 mm CS | 2.5 mm | 3.0–400.0 mm+ |
| 3.0 mm CS | 3.0 mm | 4.0–500.0 mm+ |
| 4.0–10.0 mm CS | Various | Custom on request |
For a specific metric size, use our online configurator or send your drawing with ID × CS (e.g. 24.99 × 3.53 mm). OD = ID + 2×CS.
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