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Socket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt.
The spline socket drive system was patented in the United States in 1913 by Dwight S. Goodwin [62] and initially produced by the Goodwin Hollow Set Screw Company. [61] Spline socket screws are used in avionics, high reliability applications, cameras, air brakes, construction and farm equipment and astronomy equipment.
All socket sets include multiple sockets, but the total number can vary wildly. Even a basic set should include at least the most commonly used sizes, such as ¼- , ⅜- and ½-inch standard; and ...
Early tool sets consisted of hex drive sockets and an ell bar for the drive tool. Beginning in the 1930s, the None Better line consisted of a wide variety of 1/2 square drive tools with a Cadmium finish. At this time, New Britain Machine was also supplying tools for Sears in their Craftsman line of tools. These tools are easy to distinguish as ...
A set screw is generally a headless screw but can be any screw used to fix a rotating part to a shaft, such as a line shaft or countershaft. The set screw is driven through a threaded hole in the rotating part until it is tight against the shaft. The most often used type is the socket set screw, which is tightened or loosened with a hex key.
The idea of a hex socket screw drive was probably conceived as early as the 1860s to the 1890s, but such screws were probably not manufactured until around 1910. Rybczynski (2000) describes a flurry of patents for alternative drive types in the 1860s to the 1890s in the U.S., [2] which are confirmed to include internal-wrenching square and triangle types (that is, square and triangular sockets ...