06FJS-06FJS Straight

Correct on both counts. Each port on this fitting is a female JIC swivel with a 9/16-18 thread and a 37-degree flare seat, so it'll mate up to standard male JIC ends on both sides. The swivel feature on each end means you can thread it onto both connections without having to rotate the hose or tube to get things lined up, which saves a good bit of grief during assembly.

For joining two female JIC swivel ends inline, this fitting is built exactly for that. Both sides are female JIC swivel with 9/16-18 threads and a 37 degree flare seat to SAE J514, so it matches standard JIC hose ends and tube assemblies that use that same 37 degree flare.

That's right. This straight adapter fitting is designed to join two female JIC swivel ends in your hydraulic lines, making a single, inline connection.