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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 .
BS 93:2008 — British Association (B.A.) screw threads — Requirements. The angle of the thread is 47.5° [4] : 2 and the depth of thread is 0.6 times the pitch with rounded tops and bottoms. Thus, the shortening at the crest and root is given by 0.26817 p with a radius of 0.18083 p at both crest and root. [4] : 2 The 1884 report specifies a ...
A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered thread. A screw thread is the essential feature of the screw as a simple machine and also as a threaded fastener . The mechanical advantage of a screw thread depends on its lead ...
An ASME B18.2.1 compliant cap screw has somewhat tighter tolerances than a hex bolt for the head height and the shank length. The nature of the tolerance difference allows an ASME B18.2.1 hex cap screw to always fit where a hex bolt is installed but a hex bolt could be slightly too large to be used where a hex cap screw is designed in.
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. Originally designed to enable the screws to be made using cold forming of the heads, [3] : 79–81 ...
Screw. An assortment of screws, and a US quarter for size comparison. A wood screw: a) head; b) non-threaded shank; c) threaded shank; d) tip. The six classical simple machines. A screw is an externally helical threaded fastener capable of being tightened or released by a twisting force ( torque) to the head. The most common uses of screws are ...
The Amazing Screw-On Head is a one-shot comic book written and drawn by Mike Mignola and published by Dark Horse Comics in 2002, starring the character of the same name. The Amazing Screw-On Head stars a robot living during the Lincoln administration whose head can be attached to different bodies with different tactical abilities, and who functions as an agent of the U.S. government.
Hex (board game) Hex (also called Nash) is a two player abstract strategy board game in which players attempt to connect opposite sides of a rhombus-shaped board made of hexagonal cells. Hex was invented by mathematician and poet Piet Hein in 1942 and later rediscovered and popularized by John Nash . It is traditionally played on an 11×11 ...
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