Wheel Stud thread Pitch?

[Devin Underberg]

I was going to buy new lug nuts for my sport trac and the guy behind the counter wanted to know what pitch they were. I told him they were for a Sport Trac and he said that the explorers had two different pitches. Anyone know of what the pitch is?

 

[EddieS'04]

They are, 1/2" x 20 tpi....