#4MJIC X #6 MORB 90*

That's exactly what this elbow is built for. One end is a 7/16-20 Male JIC with a 37-degree flare, and the other is a 9/16-18 Male SAE Adjustable O-ring Boss. So yeah, a #4 JIC line to a #6 ORB port at a 90-degree angle is precisely the connection this fitting makes. It's forged steel and rated to 6,000 psi dynamic pressure, so it'll hold up in a working hydraulic system without any fuss.

The 6,000 psi maximum dynamic pressure makes this elbow suitable for high-pressure environments like those found in hydraulic systems. Just be sure the gauge and pump connections match the #4MJIC and #6MORB sizes.

It is a 90 degree elbow with a 7/16-20 male JIC SAE 37 degree flare on one end and a 9/16-18 male SAE adjustable O-ring boss on the other. That matches a #4 MJIC x #6 MORB configuration.