Radium Engineering designed the 3/8 SAE Female to 90 deg 5/16in Barb as a purpose-built solution that connects 3/8 SAE Female to 90 deg 5/16in Barb, giving the system a direct transition between the two connection standards. That keeps the plumbing compact and serviceable while avoiding a stack of extra adapters in a fuel, oil, or other compatible fluid system.

The configuration shown here uses a 3/8 SAE Female SAE connection and a 90 deg fitting angle, making exact connection and component matching important during installation. Match both connection standards exactly and use the correct sealing method for the thread type being installed.