08MJ-08FP 45 ELB

For a #8 size connection, it links a male JIC O-ring face seal end to a female pipe thread end in a rigid 45 degree elbow, so it is meant to bridge those two interface types.

Yes, this 45-degree elbow fitting is designed to connect a #8 male JIC O-ring face seal port to a #8 female pipe thread port.

A 45-degree elbow gives you a gentler directional change, so it works better when your routing path is angled or diagonal rather than needing a hard corner. The 90 makes a sharp turn, which is fine when you're going straight perpendicular to something. If your line is running at an angle and you're trying to follow the contour of a tight assembly without forcing the hose or tube into a sharp bend, the 45 usually fits cleaner and puts less stress on the surrounding components.