O-Ring JIS Gm Type Size List

JIS Gm O-Rings belong to the JIS B 2401 standard series, representing Group G – medium-sized static sealing rings. These metric-sized O-Rings are designed for static sealing in high-pressure applications such as hydraulics, automotive components, compressors, and piping systems.

🔧 What is JIS Gm?

  • JIS = Japanese Industrial Standard

  • Gm = Group G, Medium-size static O-Rings

  • Defined by JIS B 2401 for hydraulic and pneumatic systems

  • Primarily used for static sealing, not dynamic movement

  • Metric sizes (mm) with tight tolerances

🧪 Available Rubber Materials

MaterialKey Features
NBROil-resistant, cost-effective, versatile
FKM (Viton)High-temp & chemical resistance
EPDMSteam, water, ozone resistance
SiliconeFood-grade, cold-resistance, flexible

🧰 Application Fields

  • Hydraulic & pneumatic static systems

  • Automotive connectors and valve blocks

  • Industrial water treatment units

  • Compressor housings and flanges

  • Stationary machinery components

🏭 Why Choose CNL for JIS O-Rings?

  • Full JIS B 2401 range

  • Large inventory of metric O-Rings in stock

  • Custom molding available for non-standard sizes

  • Certified materials (ISO, ROHS, REACH)