Threads should be 45 degrees to 3d print perfect but cad programs default to 60 because that’s standard for machining and injection molded screws. Use non uniform scaling to quickly change your threads from 60 to 45. (Adjust z height of just the screws by a factor of 3 ^ .5 = ~ 1.732 )

youtu.be/7NwkYHyJ7QY