NGK spark plugs breaking.

Technically, the thread length is longer without the washer!

No, the thread length is the same whether or not the washer is present.

Are you getting me on a technicality that a Jeep 4.0/242 is not a /6 but a L6?

Looks like it, a little around the edges, if you stand in the right spot and kinda squint.

I didn't realize some people were so 'touchy"

I'll have to beg your pardon for seeming snappish. Comes of having explained about these spark plugs endless times over many years on here. I guess I should put that on the other side of the "I'm retired" wall and not mention it again.