On 18 Jul 2011 23:42:12 GMT, notbob wrote:

On 2011-07-18, zzzzzzzzzz wrote:

It was designed to cam out before breaking the screw. DAGS.

What horsecrap.

It was developed to reduce assembly time on mass production assembly
lines. The worker with driver tool only requires a quarter turn to
align for engagement instead of up to a half turn. A phillips
fastener is also self centering. This not to say phillips fasteners
can't cam out, but so can straight slot fasteners. If the proper tool
is used, there's no reason for a phillips fasteners to cam out.

Wrong, as usual, NutJob.

Here's the DAGS you obviously didn't do.

http://www.phillips-screw.com/histor...t_phillips.htm

Half of the story.