Standard O-Ring Sizes

Society of Automotive Engineers AS568B Aerospace Size Standard for O-Rings

  • 214 V90 Cylinder with Large Neck/Valve (3/4 NPS - All Aluminum, most Steel cylinders)
  • 116 V90 Cylinder with Small Neck/Valve (7/8 UNF - "Genesis" 3500 psi Steel cylinders)
  • 112 V90 Standard DIN Regulator/Valve (Nearly all DIN regulators)
  • 111 V90 Small DIN Regulator/Valve (You know if you need this one)
  • 015 V90 Bonnet Nut O-Ring for non-Thermo valves/manifolds
  • 014 V90 Standard Yoke Regulator/K-valve
  • 013 V90 Large Low-Pressure Port/Hose (1/2 UNF)
  • 012 V90 High-Pressure Port/Hose (7/16 UNF) Manifold and Manifold Port Plugs
  • 011 V90 Standard Low-Pressure Port/Hose (3/8 UNF)
  • 010 V90 Low-Pressure Hose/2nd Stage Regulator Cylinder Valve Stem
  • 003 V75 High-Pressure Hose/SPG swivel

*V90 = 90 Durometer Viton

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