I believe the correct thread for the wheel lugs is 1/2 x 20. I had an original lug nut fail, the chrome cover came off, which is probably okay after 20 years of northeast salt and grime. I ordered new ones, Dorman brand, from Amazon (sorry, my bad). The ones they sent did not fit. It looked about right, fit the wrench, but I only got about 1/4 turn before it bound up. The studs are in good shape.
I looked carefully at the nut and it is stamped 12 x 1.5. So obviously it is a metric nut, very close to 1/2 x 20, but obviously not close enough. I sent them back, no problem I assume. But I got to wondering. I actually found a website, wheeloffset.net, that lists the spec for Jeep lugs as both M12-12 and 1/2-20.
https://wheeloffset.net/lugnuts/jeep/liberty/2006/So it got me thinking, and I have a few questions:
Is there any way this is right? Had I forced the nuts, would they have held without damaging the studs?
Did Amazon just say, well the size is close enough, we’ll just send this one?
Assuming the size is not okay, is wheeloffset.net just mistaken? Were Jeeps produced with both sizes?
All just idle curiosity now; I’m buying the right size.
Thanks.