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  2. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Below is a comprehensive drill and tap size chart for all drills and taps: Inch, imperial, and metric, up to 36.5 millimetres (1.44 in) in diameter. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.

  3. List of rail transport modelling scale standards - Wikipedia

    en.wikipedia.org/wiki/List_of_rail_transport...

    While HO scale is a 1:87 scale (3.5 mm to 1 foot), resulting in a 16.5 mm (0.65 in) gauge from real life prototype 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge standard gauge. Conversely, modeling standard gauge in Lego trains would yield a scaling of (37.5:1435 =) 1:38.3.

  4. Metric drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    So a 1 / 2 in (12.7 mm) diameter drill will be able to drill a hole 4 + 1 / 2 in (114.3 mm) deep, since it is 9 times the diameter in length. A 1 / 8 in (3.175 mm) diameter drill can drill a hole 1 + 5 / 8 in (41.275 mm) deep, since it is 13 times the diameter in flute length. [3]

  5. British Standard Whitworth - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Whitworth

    Two spanners, both nominal size 5 ⁄ 8 in, with a diagram superimposed to show the logic that allows them both to be nominal size 5 ⁄ 8 in when their actual sizes are clearly different (across-flats distance vs screw diameter). The across-flats definition is the common standard today, and has been for many decades.

  6. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    1:3: 4 in: 101.60 mm P scale - ridable narrow gage park railroads, steamrollers, traction engines, Ball-jointed dolls, Super Dollfie, Dollfie Dream 1:2.4: 5 in: 127.00 mm Park railroads, where 15 in (381 mm) minimum gauge models are based on 3 ft (914 mm) narrow gauge prototypes 1:2: 6 in: 152.40 mm "My Size" (3 ft) fashion dolls: 1:1.8 ...

  7. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    H: 91.3 L: 65.1 W: 52.4 This battery contained two independent 4.5 V batteries, and had a four-pin connector. 9 V with a center tap was available by wiring in series. There were two ⌀3.2 mm negative pins spaced 9.5 mm apart and two ⌀4.0 mm positive pins spaced 14.3 mm apart. Negative and positive pins were spaced 18.1 mm apart.

  8. List of track gauges - Wikipedia

    en.wikipedia.org/wiki/List_of_track_gauges

    603 mm: 1 ft 11 + 34 in: 610 mm 2 ft: 620 mm 2 ft 13 ⁄ 32 in: Slovenia: Cave railway in the Postojna Cave [26] 622 mm 2 ft 1 ⁄ 2 in: Wales Penrhyn Quarry Railway, until 1879 630 mm: 24 + 13 ⁄ 16 in: Germany Brickworks in Zehdenick [27] 655 mm: 2 ft 1 + 25 ⁄ 32 in: Germany Schlebusch-Harkorter Coal Railway [citation needed] 660 mm ...

  9. 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.

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