wrote:

Second question, are these "cut marks" on a lug nut normal?
http://wetakepic.com/images/2018/02/17/dented_nuts.jpg

Yes, they are there from the factory.

Why? Not all nuts have this mark, and in the UK nuts with this mark are
generally used for hoses that contain inflammable gases.

I also wonder why the cuts are there, all at the same depth on the nut.

A friend I just spoke to says his car has them too, so, they're pretty
common.

If they're made at the factory, why?