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  2. List of rail transport modelling scale standards - Wikipedia

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

    H0 or 3.5 mm: 1:87: 16.5 mm (0.65 in) H0 scale was introduced in Britain in the 1920s, and although it stayed as the most common worldwide modelling scale, in Britain H0 has little commercial availability and is generally only used to model the British prototype by a small number of modellers. 00 or 4 mm: 1:76: 16.5 mm (0.65 in)

  3. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    Original nominal 25 mm figure scale; though a 6-foot human in 1:87 is closer to 21 mm. 1:82: 3.717 mm An intermediate scale (HO/OO) intended to apply to both HO and OO scale train sets. Also used for some military models 1:80: 3.810 mm HOj scale. Very close to wargaming 20 mm figure scale (20 mm is actually 1:80.5). [10] 1:76.2: 4 mm

  4. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    [1] The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 13 millimeter, making the relationship: 1 mm = 3 Fr. Thus, the outer diameter of a catheter in millimeters can be calculated by dividing the French size by 3. [2]

  5. List of gauge conversions - Wikipedia

    en.wikipedia.org/wiki/List_of_gauge_conversions

    1,067 mm (3 ft 6 in) 600 mm (1 ft 11 + 5 ⁄ 8 in) 1950s Angola Moçâmedes Railway [1] [2] 1,067 mm (3 ft 6 in) 1,600 mm (5 ft 3 in) 1885 Australia Tasmania Rail transport in Tasmania Partially converted to dual gauge as intermediate stage. 1,435 mm (4 ft 8 + 1 ⁄ 2 in) 1,067 mm (3 ft 6 in) 1970 Australia South Australia

  6. Metric drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    For Morse taper-shank drill bits, the standard continues in 1/64 inch increments up to 1¾ inch, then 1/32 inch increments up to 2¼ inch, 1/16 inch increments up to 3 inches, 1/8 inch increments up to 3¼ inches, and a single 1/4 inch increment to 3½ inches. One aspect of this method of sizing is that the size increment between drill bits ...

  7. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.The microwave is between 1 meter to 1 millimeter.. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.

  8. British Standard Whitworth - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Whitworth

    (mm) (in) (mm) (in) (mm) 116: 1.588 60: 0.423 ... These threads are designated by a number between 1/16 and 6 that originates from the nominal internal diameter ...

  9. 3 ft 6 in gauge railways - Wikipedia

    en.wikipedia.org/wiki/3_ft_6_in_gauge_railways

    In Australia, this gauge is typically referred to as narrow gauge in comparison to 4 ft 8 + 1 ⁄ 2 in (1,435 mm) standard gauge or 5 ft 3 in (1,600 mm) broad gauge. In some instances, simply 3 foot 6 inch — or in rarer cases medium gauge — is used to distinguish it from other narrow gauges.