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