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  2. Screwfix - Wikipedia

    en.wikipedia.org/wiki/Screwfix

    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 .

  3. Buttress thread - Wikipedia

    en.wikipedia.org/wiki/Buttress_thread

    In oil field tubing, buttress thread is a pipe thread form designed to provide a tight hydraulic seal. The thread form is similar to that of Acme thread [10] but there are two distinct threaded portions of differing diameters and profiles, the larger having a wedging profile, with a tapered sealing portion in between the larger and smaller diameters.

  4. Bottom bracket - Wikipedia

    en.wikipedia.org/wiki/Bottom_bracket

    Aerozine ceramic external bottom bracket bearing cups for BSC/ISO standard, that is M34.798×1.058 mm (1.37″-24 TPI) threads and a 68 mm wide bottom bracket shell. The bottom bracket on a bicycle connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely.

  5. 6.5×68mm - Wikipedia

    en.wikipedia.org/wiki/6.5×68mm

    The 6.5×68mm rebated rim bottlenecked centerfire rifle cartridge (also known as the 6.5×68mm RWS, 6.5×68mm Schüler, or the 6.5×68mm Von Hofe Express) and its sister cartridge the 8×68mm S were developed in the 1930s by August Schüler from the August Schüler Waffenfabrik, Suhl, Germany as magnum hunting cartridges that would just fit and function in standard-sized Mauser 98 bolt-action ...

  6. 6.8mm Remington SPC - Wikipedia

    en.wikipedia.org/wiki/6.8mm_Remington_SPC

    The 6.8mm Remington Special Purpose Cartridge (6.8 SPC, 6.8 SPC II or 6.8×43mm) is a rimless bottlenecked intermediate rifle cartridge that was developed by Remington Arms in collaboration with members of the U.S. Army Marksmanship Unit and United States Special Operations Command [6] to possibly replace the 5.56 NATO cartridge in short barreled rifles (SBR) and carbines.

  7. Bofors 40 mm gun - Wikipedia

    en.wikipedia.org/wiki/Bofors_40_mm_gun

    Bofors 40 mm gun is a name or designation given to models of 40 mm calibre automatic anti-aircraft guns designed and developed by the Swedish company Bofors: . Bofors 40 mm Automatic Gun L/43 - developed in the 1930s with market entry in 1934, widely used in World War II and into the 1990s

  8. Vickers 40 mm Class S gun - Wikipedia

    en.wikipedia.org/wiki/Vickers_40_mm_Class_S_gun

    The Vickers 40 mm Class S gun, [1] [a] also known simply as the Vickers S or S gun, [3] was a 40 mm (1.57 in) airborne autocannon designed by Vickers-Armstrongs for use as aircraft armament. It was primarily used during World War II by British aircraft to attack ground targets. [4] It was largely replaced by the RP-3 rocket from 1943 on.