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Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.
Diagram of a screw head - Frearson: Date: 14 July 2009: Source: Own work: Author: Inductiveload: Other versions: Scheme of Phillips head. Scheme of Sel-O-Fit head.
Comparison of Phillips and Frearson screw heads. Reed and Prince, also called Frearson, is another historic cross-head screw configuration. The cross in the screw head is sharper and less rounded than a Phillips, and the bit has 45° flukes and a sharper, pointed end. Also, the Phillips screw slot is not as deep as the Reed and Prince slot.
Comparison of Philips and Frearson screw heads Originally uploaded by en:User:Doodle77 as a en:potraced rendering of en:Image:Frearson_vs_Phillips.JPG. Subsequently redrawn from scratch by en:User:Sakurambo: Date: 23 July 2007 (original upload date) Source: Transferred from to Commons. Author
The last image we have of Patrick Cagey is of his first moments as a free man. He has just walked out of a 30-day drug treatment center in Georgetown, Kentucky, dressed in gym clothes and carrying a Nike duffel bag.
Climate change will wipe out about $1.47 trillion in U.S. home values over the next three decades and hasten economic gaps in U.S. communities, a report released on Monday finds.