On Sun, 15 Oct 2006 09:44:36 UTC, "The3rd Earl Of Derby"
wrote:

My early days in the engineering shop was a block of 1" metal with two nuts
either side to lock it into position of the 1" block.

Aha! Will remember that...

The problem with just the two nuts is the nuts dont always end up with
their flat edge faces.

That was my thought...was trying to visualise how it could be made to
work.

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