Received from Bob Blick at 09/06/11 22:22 UTC:

>In order for lugs to stay tight, a certain amount of deformation of the lu=
g=20
>and/or its threads need to be present. Even if there is lubricant, that=20
>deformation should prevent it from loosening.


Yes, you want to stretch the bolt a bit, but nowhere near its elastic=20
limit.  That's what the specified torgue is designed to do with dry=20
threads.  Lubricating the threads reduces friction between bolt and nut so=
=20
the same torque generates greater stretch.  Probably not a problem when usi=
ng=20
a "standard length" manual lug wrench, but an issue to be considered when=20
some impact wrench jockey goes nuts tightening the bolts.

I'd  **GUESS**  that any direction to lube ONLY THE FIRST THREE THREADS wit=
h=20
dry graphite is probably meant to keep lube off the bearing surface between=
=20
the nut and the rim when the nut is tight.

Jim H=20


--=20
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