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IEC 61076-2-113 M12 connectors with screw-locking, power and signal contacts for data transmission frequencies up to 100 MHz: M12 Y-coding [6] IEC 61076-2-114 M8 connectors with screw-locking, power and signal contacts for data transmission frequencies up to 100 MHz: M8 D and P-coding; IEC 61754-27 M12-FO (fiber optic)
A metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D (the maximum thread diameter) and the pitch P, both expressed in millimetres and separated by a dash or sometimes the multiplication sign, × (e.g. M8-1.25 or M8×1.25). If the pitch is the normally used "coarse" pitch listed in ISO 261 or ...
The screw thread concept seems to have occurred first to Archimedes, who briefly wrote on spirals as well as designed several simple devices applying the screw principle. Leonardo da Vinci understood the screw principle, and left drawings showing how threads could be cut by machine. In the 1500s, screws appeared in German watches, and were used ...
William Sellers originally developed the USS thread, and set forth many of its details in his paper, "A System of Screw Threads and Nuts", presented in April 1864 to the Franklin Institute. In 1898, the standard for metric threaded fasteners was established. [5]
M8, a standard bolt and nut size in the ISO metric screw thread system; M8 Alliance, World Health Summit; M8, a dance music magazine based in Scotland; M8, Internet slang for "mate" M8, a difficulty grade in mixed climbing
Panasonic Avionics Corporation (PAC), a subsidiary of Panasonic Corporation of North America and a unit of Connected Solutions Company, Panasonic, is a supplier of in-flight entertainment (IFE) and communication systems. [121]
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.
A machine screw or bolt is usually a smaller fastener (less than 1 ⁄ 4 inch (6.35 mm) in diameter) threaded the entire length of its shank that usually has a recessed drive type (slotted, Phillips, etc.), usually intended to screw into a pre-formed thread, either a nut or a threaded (tapped) hole, unlike a wood or self-tapping screw. Machine ...