"Joe AutoDrill" fired this volley in news:GpKOo.2938
:

That's like the old saying "dead nuts" which has no real historical
reference...)


I haven't found it, Joe, but the expression is "dead to nuts", and usually
carries "accurate" as part of the phrase.

I have not located an etymology yet, but I'm betting it has to do with
either a machining/machinery term like adjustments of (say) a screw, or an
artillery term.

LLoyd