NoToy clone (SKU 6463900) had the same pin. The whole "head" is quite long, and the threaded part has just the right length. I don't remember any more, it might had dubious "quality" of the metal on first sight - like it would be too soft - but it wasn't. And besides, you replace it only once (hopefully) and not much can happen to it when it's mounted.

The pin wouldn't stop me from buying this RDA if I wanted it.