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The tool used to drive a slotted screw head is called a standard, common blade, flat-blade, slot-head, straight, flat, flat-tip, [6] or "flat-head" [7] screwdriver. This last usage can be confusing, because the term flat-head also describes a screw with a flat top, designed to install in a countersunk hole. Before the development of the newer ...
A version with left-hand threads is called an Opsit screw, where unscrewing can be done by turning the screwdriver clockwise, which is the opposite of tri-wing and regular screws. [ 90 ] [ 91 ] The design was adopted by some parts of the aerospace industry, led by Lockheed in the early 1970s on the L-1011 , but met with mixed results due to ...
They may either have a Phillips flat head or a slotted hex washer head. Nominal (thread) sizes range from 0.1875 to 0.375 in (4.763 to 9.525 mm) and lengths from 1.25 to 5 in (32 to 127 mm). Typically an installer uses a hammer drill to make a pilot hole for each concrete screw and a powered impact driver to drive the screw.
Flat-head screw, a screw with a flat top, designed to be installed in a countersunk hole Flat-head screwdriver , a screwdriver designed to turn slotted screws Zoology
The trade name "Yankee" screwdriver was first marketed by North Brothers Manufacturing Company in ≈16 April 1895, with the No. ≠130 spiral ratchet screwdriver. Yankee soon became and still is a well-known name in automatic spiral ratchet screwdrivers , with several other models, and model improvements patented by North Bros. over a 40-year ...
A screwdriver is a device specifically designed to insert and tighten, or to loosen and remove, screws The term screwdriver may refer to: Screwdriver (cocktail), a cocktail made with orange juice and vodka; Screwdriver (musician), Jamaican reggae musician "Screwdriver", a song by The White Stripes from their 1999 album The White Stripes
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 ...
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.
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