08MJ-08MAORB 45 ELB

You've got it right. One end is a Male JIC SAE 37 Degree Flare and the other is a Male SAE Adjustable O-ring Boss, both sized at 3/4-16. That combination lets you transition between those two thread types at a 45-degree angle, which comes up a lot when you're routing hydraulic lines around tight spots or trying to match ports that don't share the same thread standard.

This elbow is particularly good for high-pressure setups and other demanding jobs.