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Screwfix Direct Limited, trading as Screwfix, is a retailer of trade tools, accessories and hardware products based in the United Kingdom. [6] Founded in 1979 as the Woodscrew Supply Company, the company was acquired in July 1999 by Kingfisher plc , which also owns B&Q , and is listed on the London Stock Exchange .
Notch All-aspect missile defensive maneuver to place threat radar/missile on the beam (directly perpendicular). Modern pulse-doppler radars remove ground clutter by filtering out returns from stationary objects; putting the threat on the beam permits the defending aircraft to be confused with ground returns and hence disappear from the threat ...
US Bayonet Model 1873 Trowel. In 1870, the U.S. Army introduced the trowel bayonet, intended for individual soldiers as both a weapon and an entrenching tool. [7] [8] [6] This was followed by the development of separate trowel and spade tools, small one-hand implements that could be carried as part of a soldier's individual equipment.
Bricklayer's trowel has an elongated triangular-shaped flat metal blade, used by masons for leveling, spreading, and shaping cement, plaster, and mortar. Pointing trowel, a scaled-down version of a bricklayer's trowel, for small jobs and repair work. Tuck pointing trowel is long and thin, designed for packing mortar between bricks.
An advertisement for a Marshalltown Trowel from 1912. The origins of Marshalltown can be traced back to the American inventor and entrepreneur Dave Lennox.While working in his machine shop in the mid-1880s in Marshalltown, Iowa, Mr. Lennox received a visit from a stonemason who asked him to make a better plastering trowel [7] while working on the construction site of the Marshall County ...
Self-tapping screws can be divided into two classes: [3] those that displace material (especially plastic and thin metal sheets) without removing it, known as "thread-forming" self-tapping screws, and self-tappers with sharp cutting surfaces that remove the material as they are inserted, termed "thread-cutting" self-tapping screws.