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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 is a copolymer of Tetrafluoroethylene (TFE) and propylene. Its chemical resistance is excellent across a wide range of aggressive media. For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.
Unit of Measure

Specifications

Type

 N/A JIS Standard O-Ring

Material

 N/A Aflas

Cross Section Width

 N/A 0.331 in8.40 mm

Durometer

 N/A 83

Inside Diameter

 N/A 319.50 mm12.579 in

CSW Tolerance

 N/A 0.006 in0.18 mm

ID Tolerance

 N/A 0.039 in1.00 mm

JIS Number

 N/A P-320

Warning

 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.

O-Ring Industries

 N/A O-rings are used in the military, automotive, aerospace and agriculture industries.