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  2. Orders of magnitude (length) - Wikipedia

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

    The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 metres (⁠ 1 / 1 000 ⁠ m = 0.001 m). To help compare different orders of magnitude , this section lists lengths between 10 −3 m and 10 −2 m (1 mm and 1 cm).

  3. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    [2] [3] 1:1250: 0.244 mm: Ship models: The dominant European size for die-cast ship models, most comprehensive range. 1:1200: 0.01 0.254 mm: Ship models: A British and American size for ship and harbour models. Airfix used to produce in this scale. 1:1000: 0.305 mm This is a scale used in Germany for pre-finished airliner models.

  4. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 1 ⁄ 3 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. 3 mm caliber - Wikipedia

    en.wikipedia.org/wiki/3_mm_caliber

    4 mm» This is a list of firearm cartridges which have bullets in the 3 millimetres (0.12 in) to 3.99 millimetres (0.157 in) caliber range. All measurements are in mm (in).

  6. Caliber - Wikipedia

    en.wikipedia.org/wiki/Caliber

    The .308 Winchester is measured across the grooves and uses a .308-in diameter (7.82-mm) bullet; the military-specification version is known as 7.62 × 51 mm NATO, so called because the bore diameter measured between the lands is 7.62 mm, and the cartridge has a case 51 mm long. [5]

  7. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    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. It was used in some early transistor radio amplifiers with a Class B output stage, allowing the loud speaker to be connected between the amplifier output and the battery center tap.

  8. Springfield Armory XD - Wikipedia

    en.wikipedia.org/wiki/Springfield_Armory_XD

    The .45 ACP XD-S has a 5+1 capacity (with optional 6+1 and 7+1 magazines) and a 3.3-inch (84 mm) barrel. In January 2013, an XD-S chambered in 9×19mm Parabellum (9mm) was introduced. It is the same as the .45 ACP model, the only difference being that the 9mm XD-S has a 7+1 capacity (with optional 8+1 and 9+1 magazines) and is marginally ...

  9. Coaxial power connector - Wikipedia

    en.wikipedia.org/wiki/Coaxial_power_connector

    After the two common 5.5 mm OD (Outer Diameter) plugs, the next-most common size is 3.5 mm OD with a 1.3 mm ID (Inner Diameter), usually about 9.5 mm in length, although both longer and shorter versions also exist. These 3.5 mm OD plugs are normally used for lower voltages and currents.