Blue Anodized Aluminum Adapter (AN 919), -08 Male JIC 37 deg Flare To -06 Male JIC 37 deg Flare, Straight

For that setup, you want an AN 919 style straight adapter with a -08 male JIC 37 degree flare on one side and a -06 male JIC 37 degree flare on the other. That is exactly what this Eaton Aeroquip adapter is.

That's what this adapter handles. One end is -08 male JIC 37 degree flare, the other is -06 male JIC 37 degree flare, straight through, no bends. It's made by Eaton Aeroquip under the AN 919 spec, and the blue anodized aluminum construction keeps it light without sacrificing a solid, leak-free connection. If your application is reducing from an -08 line down to a -06 fitting in a straight run, this one fits the bill.