Stud pilot wheel fastening systems have opposite threads on one side of the bus. These are the ones with chamfered front nuts like your car, and the two piece fasteners at the rear that fasten each dual wheel one at a time.
Hub pilot, with the built-in "washer", turn the "proper" way all the way around.
Unless, as has been noted, a previous owner has done something stupid with non-matching bits and pieces...
But then to mix it up a bit more...
NJT and some other properties spec'd a nut system that used a nut with built in washer on every other lug on the wheel, while the ones in between were standard nuts. Under the washer, the nut was still chamfered also, and was a reverse thread on the drivers side.
I wasn't aware of that little fact until a couple of years ago at Timmonsville when I noticed Dave in Wilmingtons front wheels had both chamfered and washered stud piloted wheels.
I made an idiot out of myself with concern about the mounting and torque.... of course it's not difficult for me to be an idiot!