Hello, I am currently looking for center caps for my 1999 f150 wheels and I came across some that was manufactured in 01. I do know that they changed the stud size from 12mm to 14mm around 2000 if I'm not mistaken. If these are for 14mm stud will they also work for 12mm stud?

 

Nope, they will fall off. The wheels are slightly different.