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Bronze hinges were removed in favor of simple rivets, belt fastenings used small hooks, and the lowest two girdle plates were replaced by one broad plate. The component parts of the lorica segmentata moved in synchronization with the other parts. [1] This made the armor more flexible. [1] [8] The armor was very long lasting. The Kalkriese type ...
Where a fastener forms its own thread in the component being fastened, it is called a screw. [3] This is most obviously so when the thread is tapered (i.e. traditional wood screws), precluding the use of a nut, [3] or when a sheet metal screw or other thread-forming screw is used. A screw must always be turned to assemble the joint.
Roman era reenactor holding a replica late Roman spatha. The spatha was a type of straight and long sword, measuring between 0.5 and 1 metre (20 and 40 inches), with a handle length of between 18 and 20 centimetres (7 and 8 inches), in use in the territory of the Roman Empire during the 1st to 6th centuries AD.
In 1913, Woolley and Meredith defined them like Anthony, but gave the following dimensions: hex head cap screws up to and including 7 ⁄ 16 inch (11.1125 mm) have a head that is 3 ⁄ 16 inch (4.7625 mm) larger than the shank diameter; screws greater than 1 ⁄ 2 inch (12.7 mm) in diameter have a head that is 1 ⁄ 4 inch (6.35 mm) larger than ...
Clip-on nut: J-nut or U-nut, sheet metal nut, speed nut (ambiguously) Designed to be clipped to sheet metal Coupling nut: Extension nut A threaded fastener for joining two male threads, most commonly a threaded rod,[1][2] but also pipes Flange nut: Collar nut Has a wide flange at one end that acts as an integrated washer HARDLOCK Nut [3]
Before the development of the newer bit types, the flat-blade was called the "Common-Blade", because it was the most common one. Depending on the application, the name of this screwdriver may differ. Within the automotive/heavy electric industries, it is known as a "flat head screwdriver"; [ 8 ] within the avionics and mining industries, it is ...