"Tim Wescott" wrote in message
...
On Mon, 06 Oct 2014 18:04:10 -0400, Ed Huntress wrote:



I think he's talking about a Pratt & Whitney key, which is like a
plain
square key but which has rounded ends.

Yes, it's a Pratt & Whitney key, in a slot that fits it all around
with no
room to move it any direction except for up out of the slot.

Or, since it's from Germany, maybe it's a BMW key, or a Junkers Key,
or
something like that.
Tim Wescott

In German it's a fitted "feather", specified by DIN 6885.
http://de.wikipedia.org/wiki/Passfeder

-jsw