Mab77

Need to replace my lug nuts- bought new tires and they must have torqued the he’ll out of em. went change brakes and lugs are slipping . I looked online and OEM for 18” 2016 Ford F-150 xlt says 13/16” (21mm) but I can’t get a 13/16” on- I have to use a 7/8” and it’s tight. can anyone explain this? Did they put diff tires on my truck I ordered? anyway to. Order the right ones- I’m guessing if I have 7/8” lugs on mine the 13/16” won’t fit? or are the threads the same? Appreciate it!