On Fri, 25 Jul 2008 08:44:12 -0700, "Dave August"
wrote:

I just need to
know which self locking method will provide the most resistance to
removal with a standard wrench. The nut will never be removed or
reused after it's snugged down.

of course dave but the quoted part above is a description of what
Nord-Locks do best.

a round nut with no flats could do this perfectly.