Brass Adapter, 0.63 Inch Female 42 deg Inverted Flare To 1/2-14 Male NPT, 90 deg Elbow

For tying a 0.63 inch tube O.D. 42 degree inverted flare female connection into a 1/2-14 male NPT port, that’s exactly what this brass 90 degree elbow adapter is built for.

The female end on this adapter seats a 0.63 inch OD tube with a 42 degree inverted flare seat, and the male end threads into a 1/2-14 NPT port. If your tube is genuinely 5/8 inch OD and your flare matches that 42 degree inverted angle, it'll connect right up to that NPT port at a clean 90 degree turn. Just make sure your flare tool is cutting at 42 degrees and not the more common 45, because those two are not interchangeable.