JIS B 2401 Metric O-Rings

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.

Click 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