On Sat, 3 Sep 2011 18:09:36 -0400, "Existential Angst"
wrote:

The FH screw Q was not for sheetmetal, tho, but for that apparatus in a
doorway, with sufficient alum "meat" to c-sink.
I myself would not even contemplate c-sinking sheetmetal -- there's nuthin
to c-sink!!

If you make up a solid punch..with the shape of the countersink turned
on the end of it..and press it over the hole..then hit it with a hammer
a good lick...it forms a nice countersink depression that your screw
fits right into.

Ive made up a number of these for people who were doing doors and so
forth when I ran an alarm company.

Gunner

--
"The danger to America is not Barack Obama but a citizenry
capable of entrusting a man like him with the Presidency.
It will be far easier to limit and undo the follies of an
Obama presidency than to restore the necessary common sense
and good judgment to a depraved electorate willing to have
such a man for their? president.. Blaming the prince of the
fools should not blind anyone to the vast confederacy of
fools that made him their prince".