Simple Google search for about 30 seconds will get that information
right from the horse's mouth, but....

Unfortunately the information has been removed from the Phillips
manufacturer website, recently

http://www.marfas.com/phillips.shtml

http://www.justbrits.com/pozi/pozidriv.html


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I'd like someone to come up with a CREDIBLE cite on that.
It appears to fall into the "urban legend" realm.

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wrote in message ...
Fun trivia fact: the Phillips head is *designed* to cam out when you
tighten them. It's to keep you from over-torquing them.