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  2. List of naval guns by caliber - Wikipedia

    en.wikipedia.org/wiki/List_of_naval_guns_by_caliber

    30 mm (1.2 in) Mk44 Bushmaster II United States: Modern 30 mm (1.2 in) CRN 91 Naval Gun India: Modern 30 mm (1.2 in) DS30B rapid fire cannon United Kingdom: Modern 35 mm (1.4 in) Oerlikon Millennium 35 mm Naval Revolver Gun System Switzerland: Modern 37 mm (1.5 in) Cannone-Mitragliera da 37/54 (Breda) Italy: World War II 37 mm (1.5 in)

  3. Gauge (firearms) - Wikipedia

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

    However, the 3 + 12-inch (89 mm) 12-gauge shell, with its higher SAAMI pressure rating of 14,000 psi (97 MPa) compared to standard 2 + 3 ⁄ 4-inch (70 mm) and 3-inch (76 mm) 12-gauge shells with their lower pressure rating of 11,500 psi (79 MPa), began to approach the performance of the 3 + 12-inch (89 mm) 10-gauge shells with a ...

  4. List of rail transport modelling scale standards - Wikipedia

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

    P4/S4 or 4 mm: 1:76.2: 18.83 mm (0.741 in) Uses a track gauge of 18.83 mm which represents an exact scaling down of the prototype at 4 mm to 1 ft scale. P4 contains an allowance for the tighter curves found on model railways in the wheel back-to-back and related dimensions.

  5. Orders of magnitude (length) - Wikipedia

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

    1.0 mm – 0.03937 inches or 5/127 (exactly) 1.0 mm – side of a square of area 1 mm²; 1.0 mm – diameter of a pinhead; 1.5 mm – average length of a flea [27] 2.54 mm – distance between pins on old dual in-line package (DIP) electronic components; 5 mm – length of an average red ant; 5 mm – diameter of an average grain of rice

  6. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    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 miniatures where a 6 foot man would equal 15.24 mm 1:110: 2.771 mm Used for some model ships, aircraft and diecast cars. 1:108: 2.822 mm

  7. Scale length (string instruments) - Wikipedia

    en.wikipedia.org/wiki/Scale_length_(string...

    Cellos exist in a smaller range of sizes than violins, with 4/4, 3/4, 1/2, 1/4, 1/8, and 1/10 being reasonably common. As with the violin, the Stradivarius scale is regarded as standard for orchestral work; This is about 27.4 inches (700 mm). Violas are commonly described in terms of their body length rather than by a fraction. There are two ...

  8. Wrench size - Wikipedia

    en.wikipedia.org/wiki/Wrench_size

    Sizes that may interchange, depending on the precision needed, include 2 mm (close to 5 ⁄ 64 inch (1.98 mm)), 4 mm (close to 5 ⁄ 32 inch (3.97 mm)) and 8 mm (close to 5 ⁄ 16 inch (7.94 mm)). In reality, a wrench with a width across the flats of exactly 15 mm would fit too tightly to use on a bolt with a width across the flats of 15 mm.

  9. List of disk drive form factors - Wikipedia

    en.wikipedia.org/wiki/List_of_disk_drive_form...

    4 in × 1 in × 5.75 in (101.6 mm × 25.4 mm × 146 mm) = 376.77344 cm³. This smaller form factor is similar to that used in an HDD by Rodime in 1983, which was the same size as the "half height" 3½" FDD, i.e., 1.63 inches high. Today, the 1-inch high ("slimline" or "low-profile") version of this form factor is the most popular form used in ...