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List of screw drives. At a minimum, a screw drive is a set of shaped cavities and protrusions on the screw head that allows torque to be applied to it. [1][2] Usually, it also involves a mating tool, such as a screwdriver, that is used to turn it. Some of the less-common drives are classified as being "tamper-resistant".
Drill points for the smallest 133/135 size screwdriver; adapters to adapt push drill size drill point sets to the three sizes of screwdriver chuck size; countersinks; screwdriver tips holding with screw holding feature; Phillips screwdriver tips in various sizes (Ph#1 to Ph#3 in 5/16" and 9/32" shank models, Ph#1 and Ph#2 sizes only for the 7/ ...
Screwdriver with rubber handle. 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.
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 ...
A Torx T8 screw head on a hard disk drive. Torx (pronounced / tɔːrks /) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 [1] by Camcar Textron. [a] A popular generic name for the drive is star, as in star screwdriver or star bits. The official generic name, standardized by the ...
Robertson screw. A Robertson screw, also known as a square screw[1] or Scrulox, [2] is a type of screw with a square -shaped socket in the screw head and a corresponding square protrusion on the tool. Both the tool and socket have a slight taper. The contemporary square drive screw has all but replaced the Robertson screw proper and is commonly ...
British Standard Whitworth. British Standard Whitworth (BSW) is an imperial-unit -based screw thread standard, devised and specified by Joseph Whitworth in 1841 and later adopted as a British Standard. It was the world's first national screw thread standard, and is the basis for many other standards, such as BSF, BSP, BSCon, and BSCopper.
A lathe of 1871, equipped with leadscrew and change gears for single-point screw-cutting A Brown & Sharpe single-spindle screw machine. Fasteners had become widespread involving concepts such as dowels and pins, wedging, mortises and tenons, dovetails, nailing (with or without clenching the nail ends), forge welding, and many kinds of binding with cord made of leather or fiber, using many ...
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