Oil filter bolt... what’s up with this?

It’s part of the bolt. Like it’s Damascus and delaminating. I’m not going to grind it or wire wheel it. They need to have this bolt back.

That's just nasty then. Tell um you can pick up a fifty plus year old one in better shape. Just remember though, there are TWO kinds of those bolts. That's actually the better of the two. The other one has the holes drilled closer together and can twist off and break when tightened down.