When I first got our trailer, I "chased" the threads on both the studs and nuts with my tap/die set. I also did my five spare lug nuts. That's forty-five threadings in all. It's a Blue Point (Snap-On) set, so I'm confident it's accurate.
I was amazed at how large a percentage were "tight" when using either a die or tap on them.
A star wrench now whirls them on and off with ease, and I feel good that the torque wrench can do its job with a higher degree of accuracy.
2004 Terry 250RKS, perfect for the two of us and the pups. It recently replaced our Flagstaff 21FB.
2000 F-350 7.3L CC/LB 4WD Lariat 3:73's