These fittings were designed by PURE Choice Motorsports for those of you with 5/16" or 3/8" stock steel tubing flared with a 45 degree double flare and need to go to -6 AN male for your fuel or transmission lines.
P/N 5890 3/8" female inverted to -6 AN
P/N 5895 5/16" female inverted to -6 AN