Large O-Ring Sizes
Sizing Your Compression Molded Large O-Rings
Selecting Cross Section Size and Diameter for
Precise O-Ring Production
At North Coast Seal, we customize O-ring sizes to your precise specifications. We can provide any size you need after you choose from our available cross sections—starting at 2.62 mm up to 40 mm—and calculate the diameter required. With no cost for molds and no minimum quantity, North Coast Seal’s O-ring production process offers personalization, competitive pricing, and express delivery. Using manipulators for control and specially developed software, we provide large-scale O-rings that do not require joints, vulcanization, or glue. North Coast Seal makes O-ring production simple: One cross size, one production line, and all the diameters you need!
O-Ring Size Chart
Available Cross Section Sizes at North Coast Seal
Are you ready to size your O-rings? Choose from the available cross section sizes listed below and calculate the diameter* for your application. North Coast Seal will produce your O-rings according to your precise specifications. Please note that all cross section sizes are in millimeters.
| 2.62 | 8.00 | 16.00 |
| 3.00 | 8.40 | 17.00 |
| 3.53 | 8.50 | 18.00 |
| 4.00 | 9.00 | 19.00 |
| 4.50 | 9.50 | 20.00 |
| 5.00 | 10.00 | 22.00 |
| 5.33 | 10.82 | 24.00 |
| 5.50 | 11.00 | 25.00 |
| 5.70 | 12.00 | 26.00 |
| 6.00 | 12.70 | 28.00 |
| 6.35 | 13.00 | 30.00 |
| 6.50 | 14.00 | 40.00 |
| 7.00 | 14.40 | – |
| 7.50 | 15.00 | – |
*Our minimum inside diameter is 200 mm. The thinnest cross section we make is 2.62 mm.
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