JIS O-Ring Size Chart

JIS O-Ring Sizes

The JIS (Japanese Industrial Standard) o-ring standard is meticulously designed to cater to the unique requirements of Japanese-manufactured equipment and components, offering a detailed collection of sizes optimized for Japan’s diverse industrial applications and tolerances in accordance with ISO 3601-1B. This standard categorizes o-ring sizes into four distinct groups, each tailored for specific applications:

• P Series – Dynamic Applications: These o-rings are designed for applications where there is relative motion between the parts being sealed.
• G Series – Static Applications: Ideal for applications where the sealing surfaces remain stationary relative to one another.
• S Series – Special Sizes: This group encompasses o-rings that do not fit into the standard P, G, or V series, offering solutions for unique or uncommon applications.
• V Series – Vacuum Flange: Specifically designed for sealing vacuum flanges, these o-rings are critical in applications requiring airtight seals under vacuum conditions.

The table below describes the JIS o-ring standard by reference code, cross-section, inside diameter, and tolerances in millimeters. For a quick size search, you can search by the reference code, cross-section, or inside diameter.