CGA 580 connections are commonly used when connecting regulators or transfer lines to non-flammable, non-oxidizing compressed gas cylinders such as Nitrogen, Argon, or Helium. CGA-500 up to 3,000 PSI / CGA-510 up to 500 PSI / CGA-580 up to 3,000 PSI / CGA-590 up to 3,000 PSI.