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The Phillips/square screw drive, also known as the Quadrex, Pozisquare screw drive, is a combination of the Phillips and Robertson screw drives. While a standard Phillips or Robertson tool can be used, there is also a dedicated tool for it that increases the surface area between the tool and the fastener so it can handle more torque.
After failing to interest manufacturers, Thompson sold his self-centering design to Phillips in 1935. [4] Phillips formed the Phillips Screw Company in 1934. After refining the design (U.S. Patent #2,046,343, U.S. Patents #2,046,837 to 2,046,840) for the American Screw Company of Providence, Rhode Island, Phillips succeeded in bringing the design to industrial manufacturing and promoting its ...
Date/Time Thumbnail Dimensions User Comment; current: 20:28, 2 July 2024: 512 × 512 (350 bytes): Andrew Pertsev: correction, svg code reduction: 22:35, 26 January 2024
Phillips offered his screw to the American Screw Company, and after a successful trial on the 1936 Cadillac, it quickly swept through the American auto industry. With the Industrial Revival at the end of the Great Depression and the upheaval of World War II, the Phillips screw quickly became, and remains, the most popular screw in the world. A ...
Many screws used in electrical applications (for example, a typical NEMA 5-15R, breaker screws, and conduit screws) use a combination of a slotted/Phillips/Robertson screw head. A few tool manufacturers make bits to engage this screw head better than the traditional Phillips allowing for more torque before camout, for example, the C1 and C2 ...
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2 Prison screw. 4 comments. 3 PolyDrive. 1 comment. 4 Spline drive. 1 comment. 5 Erroneous? 9 comments. 6 Screw head diagrams. 2 comments. 7 Clutch head bit is not ...
Date/Time Thumbnail Dimensions User Comment; current: 17:58, 14 March 2024: 512 × 512 (230 bytes): Andrew Pertsev: svg code reduction: 17:53, 14 March 2024: 512 × 512 (232 bytes): Andrew Pertsev