JIS B 2401 Metric O-Rings Size Chart
JIS B 2401 is a Japanese Industrial Standard for O-Ring sizes. This standard, often referred to as “Japanese Metrics”, is organized into four series, based on their application. The O-Rings in each section have ascending number codes to complete the size reference.
For a complete listing of all metric o-ring sizes, visit our Metric O-Ring Cross Reference Table.
SHOP FOR METRIC O-RINGSClick on a Series below to view the size chart for that particular series, or scroll down to see the size chart for all JIS sizes sorted from smallest to largest, C/S then I.D.
- JIS: P Series – Moving (dynamic)
- JIS: G Series – Fixed (static)
- JIS: S Series – Special Sizes
- JIS: V Series – Vacuum Flange
All JIS Sizes – Sorted by Size
Reference | C/S (MM) | I.D. (MM) | C/S (Inch) | I.D. (Inch) |
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JIS – P Series
Reference | C/S (MM) | I.D. (MM) |
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JIS – G Series
Reference | C/S (MM) | I.D. (MM) |
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JIS – S Series
Reference | C/S (MM) | I.D. (MM) |
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JIS – V Series
Reference | C/S (MM) | I.D. (MM) |
---|---|---|
V15 | 4 | 14.5 |
V24 | 4 | 23.5 |
V34 | 4 | 33.5 |
V40 | 4 | 39.5 |
V55 | 4 | 54.5 |
V70 | 4 | 69 |
V85 | 4 | 84 |
V100 | 4 | 99 |
V120 | 4 | 119 |
V150 | 4 | 148.5 |
V175 | 4 | 173 |
V225 | 6 | 222.5 |
V275 | 6 | 272 |
V325 | 6 | 321.5 |
V380 | 6 | 376 |
V430 | 6 | 425.5 |
V480 | 10 | 475 |
V530 | 10 | 524.5 |
V585 | 10 | 579 |
V640 | 10 | 633.5 |
V690 | 10 | 683 |
V740 | 10 | 732.5 |
V790 | 10 | 782 |
V845 | 10 | 836.5 |
V950 | 10 | 940.5 |
V1055 | 10 | 1044 |