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  2. British Standard Pipe - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Pipe

    (in −1) (mm) (in) (mm) (in) (mm) (in) (mm) (mm) (mm) 1 ⁄ 16: 28: 0.907 0.3041 7.723 0.2583 6.561 5 ⁄ 32: 4.0 6.6: 6.8 1 ⁄ 8: 28: 0.907 0.3830 9.728 0.3372 8.566 5 ⁄ 32: 4.0 8.6: 8.8 14: 19: 1.337 0.5180 13.157 0.4506 11.445 0.2367: 6.0 11.5: 11.8 3 ⁄ 8: 19: 1.337 0.6560 16.662 0.5886 14.950 14: 6.4 15.0: 15.3 1 ⁄ 2: 14: ...

  3. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  4. Drill bit sizes - Wikipedia

    en.wikipedia.org/wiki/Drill_bit_sizes

    So a 1 / 2 in (12.7 mm) diameter drill will be able to drill a hole 4 + 1 / 2 in (114.3 mm) deep, since it is 9 times the diameter in length. A 1 / 8 in (3.175 mm) diameter drill can drill a hole 1 + 5 / 8 in (41.275 mm) deep, since it is 13 times the diameter in flute length.

  5. Image sensor format - Wikipedia

    en.wikipedia.org/wiki/Image_sensor_format

    The common 1" outside diameter circular video camera tubes have a rectangular photo sensitive area about 16 mm on the diagonal, so a digital sensor with a 16 mm diagonal size is a 1" video tube equivalent. The name of a 1" digital sensor should more accurately be read as "one inch video camera tube equivalent" sensor.

  6. Standard-gauge railway - Wikipedia

    en.wikipedia.org/wiki/Standard-gauge_railway

    The 4 ft 9 in (1,448 mm) railways were intended to take 4 ft 8 + 1 ⁄ 2 in (1,435 mm) gauge vehicles and allow a (second) running tolerance. The Chester and Birkenhead Railway , authorised on 12 July 1837, used 4 ft 9 in ( 1,448 mm ).

  7. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    The new standards gave an inch of exactly 25.4 mm, 1.7 millionths of an inch longer than the old imperial inch and 2 millionths of an inch shorter than the old US inch. [ 46 ] [ 47 ] Related units

  8. Point (typography) - Wikipedia

    en.wikipedia.org/wiki/Point_(typography)

    The desktop publishing point (DTP point) or PostScript point is defined as 1 ⁄ 72 or 0.013 8 of an inch, making it equivalent to 25.4 ⁄ 72 mm = 0.352 7 mm. Twelve points make up a pica, and six picas make an inch.

  9. 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.