Phillips Screw Company www.phillips-screw.com +1 781 224 9750 301 Edgewater Drive, Suite 320, Wakefield, MA, 1880, USA Phillips Screw Company www.phillips-screw.com +1 781 224 9750 301 Edgewater Drive, Suite 320, Wakefield, MA, 1880, USA As American industry turned to mass production in the 1920s, the drawbacks of the traditional slotted screw became evident. The alignment time of the driver in the screw recess multiplied thousands of times in a factory, and the cam-out from increased tightening torques, resulted in the invention of the modern fastener drive system. Contact Us Facebook page Twitter Linked In YouTube Contact Us Facebook page Twitter Linked In YouTube Latest News Documents to download Fastener Head Strength: Defining the Metrics and Why It Is Critical Documents to download Fastener-Head-Strength-April-2018-White-Paper(.pdf, 782.84 KB) - 632 download(s)