How do you put them in? Every time i try to screw the castle nuts on the threads spins with the nuts? 

How do you put them in? Every time i try to screw the castle nuts on the threads spins with the nuts?![]()
If the nuts are tight on the threads something is wrong.
The nuts must spin freely on the threads before you install them otherwise they will give you greif in the future.
You may be able to force them on with damaged threads or tapers, but getting them off next time could prove to be a complete nightmare.
If the nuts are tight on the threads something is wrong.
The nuts must spin freely on the threads before you install them otherwise they will give you greif in the future.
You may be able to force them on with damaged threads or tapers, but getting them off next time could prove to be a complete nightmare.
They're brand new and they do it...? X(
I really hope that you do not have problems getting them off when you need to.
It is a very different story when the nuts are tight when you break the tapers, the only way to remove them will be with a pickle fork which stresses the joint and wrecks the rubbers.