Is this nut on backwards?

69_340_GTS said
No, but as I said, the nut has a castellated part. I don't know what else you'd call it.

They go on the way it shows here (click on link), which is what slantsixdan and a few others have said: Slant 6 Exhaust Manifold Washers
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That's what I thought from article on slantsix.org. I believe Dan wrote it. But the post he just linked to regarding McMaster I thought was saying the opposite.