Almost sounds to me like he used an NPT tap but went too far on the taper and the fitting might not start to bite until it's bottomed out.

1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi
2020 RAM 1500
[img]https://i.imgur.com/v9yezP9.jpg[/img]