90* Male Bspp X Male Bspt

For a G 3/4 - 14 male on one end and an R 3/4 - 14 male on the other, this Adaptall 90 degree steel elbow is the right match. It is built specifically to transition from BSPP (parallel) to BSPT (tapered) while keeping the nominal 3/4 inch size on both sides.

At 27mm across the wrench flats, you've got enough to work with for standard tooling, but the short body does mean you'll want to think through access before you commit to a routing position. The 39mm and 40mm leg lengths are compact by design, so if you're working in a spot where the wrench has to swing even a quarter turn, it's worth dry-fitting first and confirming you can get full engagement on both ends before final installation.