O-Ring JASO Type Size List

JASO O-Rings, standardized by the Japanese Automotive Standards Organization, are widely used in Japanese vehicles, motorcycles, and industrial machines. These O-Rings follow metric (mm) dimensions and are a preferred choice for engineers working with Asian machinery and systems.

🔧 What is JASO?

  • JASO = Japanese Automotive Standards Organization

  • Metric-based ID (Inner Diameter) and CS (Cross Section)

  • Used in Japanese automobiles, motorcycles, pumps, and valves

  • Known for tight dimensional tolerances and high reliability

  • Common designations: P-series, G-series, S-series, V-series

🧪 Available Materials

MaterialKey Properties
NBRGeneral-purpose, oil resistant
FKM (Viton)High temperature & chemical resistance
EPDMExcellent ozone & steam resistance
SiliconeLow-temperature flexibility, FDA compliant

🧰 Applications

  • Japanese and Asian automotive systems

  • Hydraulic and pneumatic sealing

  • Fuel systems, oil pumps, brake systems

  • Water treatment equipment

  • Motorcycle and scooter maintenance

🏭 Why Choose CNL for JASO O-Rings?

  • Full range of JASO standard sizes in stock

  • Material options: NBR, FKM, EPDM, Silicone

  • ROHS, REACH, ISO-compliant options

  • Custom colors, hardness, and rapid prototyping available