Conical ended lug nuts match a conical hole. The nuts centre the wheel, usually referred to as lug centric. This is normal for steel wheels.

T-shaped nuts bolt down on to flats in the wheel. The wheel is centered by the hub -the hole in the center of the wheel and the hub should match each other and fit closely together. It's called hub centric and usual for alloys.

There are other systems, but they aren't so common. I think Mercedes use domed lug nuts that need some special care when tightening

 

I don'



t know why it shows my old XJS the current car is 1 91 XJ^. Someone asked for phots of the lug nuts and washer so here we go. They are Dayton wires on the car.

 

those lugnuts will not work with a Kent wheel. Too long.
Kent wheel lugnuts in my 1984 were short nuts.
I still have 4 of them. I posted a picture of them a while back.
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No Jose its not an XJS, that was my old car it is a 4.0 XJ6 Soverign 1991.
Thanks

 

You have it correct. I Put the tear drop spare on the front this morning and you can wiggle the wheel. The Dayton wire lugs bottom out before that are tight. So now I need to find a set of lugs that fit the tear drop wheel.

 

Thanks everyone, problem diagnosed and fixed. Ordered a set of lug nuts this am.