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  2. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Example (inch, coarse): For size 7 ⁄ 16 (this is the diameter of the intended screw in fraction form)-14 (this is the number of threads per inch; 14 is considered coarse), 0.437 in × 0.85 = 0.371 in. Therefore, a size 7 ⁄ 16 screw (7 ⁄ 16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.

  3. Metric drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    The lower drill bit is the jobber or parallel shank equivalent. Center drill bit sizes. Center drills, numbers 1 (bottom) through to 6 (top) ... 5 ⁄ 16 in (7.938 mm ...

  4. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    This metrication problem is further complicated in medical contexts where metric and imperial units are used ... 15.7 5.00 0.20 16 16.8 5.33 0.21 17 17.8 5.67 0.22 ...

  5. Preferred metric sizes - Wikipedia

    en.wikipedia.org/wiki/Preferred_metric_sizes

    A standard metric (concrete) block is 190 mm wide, 390 mm long, and 190 mm high, which allows for 10 mm mortar joints in between bricks, giving a standard unit size of 200 mm square by 400 mm long. [3] A standard metric brick is 90 by 57 by 190 mm; with 10 mm of mortar, that produces a standard unit of 100 mm x 200 mm. [3]

  6. British Standard Whitworth - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Whitworth

    BA threads have diameters of 6 mm (0BA) and smaller, and were and still are particularly used in precision machinery. The Whitworth 55° angle remains commonly used today worldwide in form of the 15 British standard pipe threads defined in ISO 7, which are commonly used in water supply, cooling, pneumatics, and hydraulic systems.

  7. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    2.5.16 Electrical. 2.5.17 ... Metric units are units based on the metre, ... The roentgen equivalent man (rem) is a unit of equivalent dose equal to 10 ...

  8. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    7.02 mm: Model railways (0) Exact O scale of 7 mm = 1 foot. 1:43: 7.088 mm: Die-cast cars: Still the most popular scale for die-cast cars worldwide, metric or otherwise. It originates from British O scale. 1:40: 0.3 in: 7.620 mm The very early models of the British Coronation Coach and a few other horse-drawn wagons were made in this scale.

  9. 7/16 DIN connector - Wikipedia

    en.wikipedia.org/wiki/7/16_DIN_connector

    The inner contact on the 7-16 DIN connector measures 7 mm in outer diameter while the outer contact on the connector measures 16 mm. in inner diameter [3] DIN is an acronym for the Deutsches Institut für Normung, the standards organization that harmonized the standard for the connector. (Previously the 7-16 had been developed as a military ...