Screw This!

Hey there, CR4er!Take a look to your left. Take a look to your right.Odds are you are within reach of a hardware fastener that attributes its mechanical capabilities to the helical groove that extends around the circumference of the device's shank. These threads provide the friction and tract

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http://cr4.globalspec.com/blogentry/20612/Screw-This?from_rss=1

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