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  2. List of disk drive form factors - Wikipedia

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

    5.75 in × 3.25 in × 8 in (146.1 mm × 82.55 mm × 203 mm). This smaller form factor, first used in an HDD by Seagate in 1980, was the same size as full-height 51⁄4 -inch-diameter (130 mm) FDD, 3.25-inches high. This is twice as high as "half height"; i.e., 1.63 in (41.4 mm). Most desktop models of drives for optical 120 mm disks (DVD, CD ...

  3. .410 bore - Wikipedia

    en.wikipedia.org/wiki/.410_bore

    The Savage Model 24 is an American-made, over-and-under, combination gun, manufactured by Savage Arms. The basic .22LR over .410 bore model weighs 7 pounds (3.2 kg), has 24-inch (610 mm) barrels, and an overall length of 41 inches (1,000 mm). It may also be disassembled for ease of stowage.

  4. Drive bay - Wikipedia

    en.wikipedia.org/wiki/Drive_bay

    Half-height drive bays are inches (41.3 mm) high by inches (146.1 mm) wide, and are the standard housing for CD and DVD drives in modern computers. They were sometimes used for other things in the past, including hard disk drives (roughly between 10 and 100 MB) and floppy disk drives. Often represented as 5.25-inch, these floppy disk drives are ...

  5. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The Charrière is measured by the ''outer'' diameter, and is defined as 1 Fr = 1/3 mm, and thus 1 mm = 3 Fr; therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3. [2] The French units roughly correspond to the outer circumference of the catheter (see table below).

  6. American wire gauge - Wikipedia

    en.wikipedia.org/wiki/American_wire_gauge

    The next wire size larger than 4/0 has a cross section of 250 kcmil. A circular mil is the area of a wire one mil in diameter. One million circular mils is the area of a circle with 1,000 mil (1 inch) diameter. An older abbreviation for one thousand circular mils is MCM.

  7. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    It is especially popular as a unit of measurement with shooters familiar with the imperial measurement system because 1 MOA subtends a circle with a diameter of 1.047 inches (which is often rounded to just 1 inch) at 100 yards (2.66 cm at 91 m or 2.908 cm at 100 m), a traditional distance on American target ranges.

  8. Computer case screws - Wikipedia

    en.wikipedia.org/wiki/Computer_case_screws

    The #6-32 UNC is a UTS screw specifying a major thread diameter of #6 which is defined as 0.1380 inches (3.51 mm); and 32 tpi (threads per inch) which equates to a thread pitch of 0.031250 inches (0.7938 mm). The optional UNC specification indicates the standard coarse thread is used which is defined for #6 screws as 32 tpi rendering 'UNC ...

  9. United States Mint coin sizes - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin_sizes

    Notes on the tables: Images are close to actual size on a 92- dpi monitor. Clad Half Dollars, Silver Half Dollars and Dollars, and Gold Half Eagles and Eagles are still regularly minted as commemorative coins. Dimes, quarters and half dollars are also struck in 90% silver for special annual collector's sets.