Kingtal0n

My last two 240 came with an aftermarket steering wheel already installed, quick release.

I like it but since I didnt install it, I am not sure if its even installed correctly.

I noticed on both cars that the large center nut that holds the steering wheel on seems to come loose all by itself after 3-4 months.

So here is my question before I get crazy and stake the dang thing.

Is there some kind of special hardware I am maybe missing? A lock washer perhaps? Any harm in adding one?
Or a special way to tight this specific nut?

Because I tried loc-tite and a wrench and that doesn't last very long. And I am afraid to overtighten it or break it...