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  2. 12 mm caliber - Wikipedia

    en.wikipedia.org/wiki/12_mm_caliber

    13 mm» This is a list of firearm cartridges which have bullets in the 12 millimetres (0.47 in) to 12.99 millimetres (0.511 in) caliber range. Length refers to the cartridge case length.

  3. Gauge (firearms) - Wikipedia

    en.wikipedia.org/wiki/Gauge_(firearms)

    A 12-gauge shotgun, nominally 18.5 mm (0.73 in), can range from a tight 18 mm (0.71 in) to an extreme overbore of 20 mm (0.79 in). Some also claim an increased velocity with the overbored barrels, up to 15 m/s (49 ft/s), which is due to the larger swept volume of the overbored barrel.

  4. 12 mm Lefaucheux - Wikipedia

    en.wikipedia.org/wiki/12_mm_Lefaucheux

    Bullet diameter: 11.3 mm (0.44 in) Neck diameter: 11.8 mm (0.46 in) Base diameter: ... Originally, the 12 mm, was a classic Lefaucheux cartridge, with a side pin from ...

  5. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    Used for 12 mm, and 12.5 mm figure scale miniature wargaming. 1:128: 3 ⁄ 32 in: 2.381 mm A few rockets and some fit-in-the-box aircraft are made to this size. 1:120: 0.1 in: 2.54 mm: Model railways (TT) Derived from the scale of 1 inch equals 10 feet.TT model railroad scale. Used in AD&D Battlesystem Skirmishes rules. Works with 15 mm ...

  6. Caliber - Wikipedia

    en.wikipedia.org/wiki/Caliber

    small-bore refers to calibers with a diameter of 0.32 inches (8.1 mm) or smaller; medium-bore refers to calibers with a diameter of 0.33 inches (8.4 mm) to 0.39 inches (9.9 mm) large-bore refers to calibers with a diameter of 0.40 inches (10 mm) or larger

  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. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    120 Mmdiameter of EBLM J0555-57Ab, the smallest-known star; 120 Mmdiameter of Saturn; 142 Mmdiameter of Jupiter, the largest planet in the Solar System; 170 Mmdiameter of TRAPPIST-1, a star discovered to have seven planets around it; 174 Mmdiameter of OGLE-TR-122b, one of the smallest known stars

  9. Wire gauge - Wikipedia

    en.wikipedia.org/wiki/Wire_gauge

    No. 7/0, the largest size, is 0.50 inches (500 mils or 12.7 mm) in diameter (250 000 circular mils in cross-sectional area), and the smallest, No. 50, is 0.001 inches (1 mil or 25.4 μm) in diameter (1 circular mil [cross-sectional area] or 0.7854 millionths of a square inch).