Japanese Industrial Standard O-Rings are another popular classification system used around the globe. Published by the Japanese Standard Association, these o-rings are also categorized using the metric system. JIS O-Rings are used in many different fields, but typically are implemented in Japan's semiconductor, automotive and machine tool industries.

This elastomer possesses mechanical properties similar to Viton®, with the exception of its slightly lower compression set resistance. It is more suitable for sensitive applications where lighter compressive forces are applied to energize the seal. This core has a Shore A hardness of 70 but it also offers a broader operating temperature range of -80°F to +500°F. (-62°C to +260°C).

Unit of Measure

Inside Diamter

N/A 114.40 mm4.504 in

Cross Section Width

N/A 0.122 in3.10 mm


N/A 70

CSW Tolerance

N/A 0.004 in0.10 mm

JIS Number

N/A G-115

ID Tolerance

N/A 0.016 in0.40 mm


N/A JIS Standard O-Ring


N/A Silicone


N/A Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.

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