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Mithril is a fictional metal found in J. R. R. Tolkien's Middle-earth writings. It is described as resembling silver , but being stronger and lighter than steel . It was used to make armour, such as the helmets of the citadel guard of Minas Tirith , and ithildin alloy, used to decorate gateways with writing visible only by starlight or moonlight.
A tipped tool is any cutting tool in which the cutting edge consists of a separate piece of material that is brazed, welded, or clamped onto a body made of another material. In the types in which the cutter portion is an indexable part clamped by a screw, the cutters are called inserts (because they are inserted into the tool body).
Maglor casts a Silmaril into the Sea by Ted Nasmith, 1997. The painting was used on the front cover of HarperCollins's illustrated edition of The Silmarillion in 1999. [1]J. R. R. Tolkien describes the history of the Silmarils in The Silmarillion, published after but in fiction long preceding the events of The Lord of the Rings.
A rib neck carriage bolt has several longitudinal ribs instead of the square section, to grip into a metal part being fixed. confirmat screw: confirmat screw: Used in particleboard and medium-density fiberboard: elevator bolt: An elevator bolt is a similar to a carriage bolt, except the head (or foot, depending on the application) is thin and flat.
A bodkin point arrowhead. A bodkin point is a type of arrowhead.In its simplest form it is an uncomplicated squared metal spike, and was used extensively during the Middle Ages.
Ancient Japanese iron kaginawa climbing hook A chain grapnel – used to recover a cable from the seabed. A grappling hook or grapnel is a device that typically has multiple hooks (known as claws or flukes) attached to a rope or cable; it is thrown, dropped, sunk, projected, or fastened directly by hand to where at least one hook may catch and hold on to objects.
Another common inspection point is the straightness of a bolt or screw. This topic comes up often when there are assembly issues with predrilled holes as the first troubleshooting point is to determine if the fastener or the hole is at fault. ASME B18.2.9 "Straightness Gage and Gaging for Bolts and Screws" was developed to address this issue.
This page lists the standard US nomenclature used in the description of mechanical gear construction and function, together with definitions of the terms. The terminology was established by the American Gear Manufacturers Association (AGMA), under accreditation from the American National Standards Institute (ANSI).