Why don't my wheels fit on?

[aerosam]

HI Guys,

I assembled the front suspension the other day, wishbones, uprights, brake discs onto the uprights, wheel on (13" capri steel wheel) ran the nuts down and they bottomed out inside the nut caps before they got to the wheels, about 3/8" gap between the bottom of the nut and the wheel.

Do I simply need open nuts that will run all the way down, or am I being completely dull, and missed something out?

Thanks,

Sam