[T3] 10mm

[Mike Fisher]

Sounds as if you are missing the tapered bushing with a hex center?

On Tue, Jan 31, 2012 at 2:25 PM, Gary Forsmo <gbforsmo at gmail.com> wrote:
> *Dave --
>
> *I think I recall a big cross-head screw in one of mine with a broken
> glass, but this one sounds more like part of the casting, as Jim says.  Why
> would they machine a bolt shank as a hexagon section?  The hexagon shape is
> to lock the shell to stop it rotating.  Try a magnet on this shank and see
> if it is attracted.  If not, it's probably part of the casting, which would
> explain why it's getting rounded off so easily.  I don't see why you
> shouldn't drill and tap a hole there - you would need to use a locking
> washer to stop the shell rotating.
>
> *Good idea, with the magnet.
>
> However the hex portion of the bolt, fits into a perfectly ROUND hole in
> the s.s. shell.  So it has no effect to prevent spinning of the mirror
> shell.
>
> And there IS an Exterior Tooth Lock Washer.  It's between the nut and a
> steel, "triangle-shaped" washer/piece, somewhat like the shape of the cast
> arm bearing surface .
>
> Gary "Frito"
>
>
> *
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