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2. British Association screw threads - Wikipedia

   en.wikipedia.org/wiki/British_Association_screw...

   A 2BA thread is used to connect the metal barrel of a dart to its shaft — as such, it is one of the few common uses of this thread in North America. In the UK, 2BA threads are commonly found in the old imperial British Engineering Standards Association (BESA) conduit boxes , and 4BA threads in light switch and socket back boxes which are ...

3. Dart (missile) - Wikipedia

   en.wikipedia.org/wiki/Dart_(missile)

   For competitive purposes, a dart cannot weigh more than 50 g (1.8 oz) including the shaft and flight and cannot exceed a total length of 30 cm (12 in). [ 11 ] [ 12 ] They are designed to penetrate dart boards .

4. British Standard Whitworth - Wikipedia

   en.wikipedia.org/wiki/British_Standard_Whitworth

   The Whitworth thread was the world's first national screw thread standard, [1] devised and specified by Joseph Whitworth in 1841. Until then, the only standardization was what little had been done by individual people and companies, with some companies' in-house standards spreading a bit within their industries.

5. Unified Thread Standard - Wikipedia

   en.wikipedia.org/wiki/Unified_Thread_Standard

   The standard designation for a UTS thread is a number indicating the nominal (major) diameter of the thread, followed by the pitch measured in threads per inch.For diameters smaller than ⁠ 1 / 4 ⁠ inch, the diameter is indicated by an integer number defined in the standard; for all other diameters, the inch figure is given.

6. Plumbata - Wikipedia

   en.wikipedia.org/wiki/Plumbata

   The plumbata consisted of a lead-weighted head attached to a wooden shaft with fletching, which allowed soldiers to throw them effectively over long distances. The Roman work De rebus bellicis and the Byzantine manual of war Strategicon , confirm their use and describe variations, such as the spiked plumbatae ( plumbata tribolata ).

7. Week 4 Throwing Darts: It's been so long since a Chiefs ...

   www.aol.com/sports/week-4-throwing-darts-long...

   October 1, 2021 at 9:49 AM Last week wasn’t the cleanest week for the darts ; some of them missed the target, some of them missed the board completely. Back to basics this week, with four ...