hmm my best guess would be closer to the spyder threads on the chart, just because the smart parts one looks like its slope (probably the wrong term) is very steep with only 3 full turns on it. the spyder one is seems a bit closer because its flatter and has more turns like the ones you've got.
easiest thing is if you know anybody with these type of guns kicking about just try gently screwing them in, don't force it in case its wrong you might cross thread it.