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  2. Computer case screws - Wikipedia

    en.wikipedia.org/wiki/Computer_case_screws

    A regular computer case may require/include [5] 7 thumb screw 6-32 × 6 mm for 2.5” drive tray, expansion slots; 4 hexagon screw 6-32 × 6 mm for psu; 21 phillips screw 6-32 × 5 mm for motherboard, 3.5” harddisk tray; 12 phillips screw M3 × 5 mm for 2.5” harddrive; 16 KB5 x 10 mm for fans; 9 standoff 6-32 × 6.5 + 4 mm for motherboard

  3. Micrometer (device) - Wikipedia

    en.wikipedia.org/wiki/Micrometer_(device)

    They allow, for example, the measuring of a narrow o-ring groove. Pitch-diameter micrometers (aka thread mics) have a matching set of thread-shaped tips for measuring the pitch diameter of screw threads. Limit mics have two anvils and two spindles, and are used like a snap gauge. The part being checked must pass through the first gap and must ...

  4. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    A measuring instrument for lengths: a typical tape measure with both metric and imperial units and two US pennies for comparison A measuring instrument is a device to measure a physical quantity . In the physical sciences , quality assurance , and engineering , measurement is the activity of obtaining and comparing physical quantities of real ...

  5. Calipers - Wikipedia

    en.wikipedia.org/wiki/Calipers

    Inside small jaws: used to measure the internal diameter of an object (like a hollow cylinder or pipe). Depth probe, or depth rod: used to measure depths of an object (like a small beaker) or a hole. Main scale (metric): marked every millimeter and helps to measure length correct up to 1 mm. Main scale (imperial): marked in inches and fractions.

  6. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    A CD-ROM can easily store the entirety of a paper encyclopedia's words and images, plus audio and video clips. Volume or capacity of data is often compared to works of literature or large collections of writing. Popular units include the Bible, the Encyclopædia Britannica, phone books, the complete works of Shakespeare, and the Library of ...

  7. Hand strength - Wikipedia

    en.wikipedia.org/wiki/Hand_strength

    In this scale, muscle strength is graded on a scale from 0 to 5. For evaluating the strength of the intrinsic hand muscles, a small modification to the standard MRC grading has been made so that grade 3 indicates ‘full active range of motion’ as compared to ‘movement against gravity’: [2]

  8. Bed of nails tester - Wikipedia

    en.wikipedia.org/wiki/Bed_of_nails_tester

    Spring loaded pins are a component of the bed of nails tester. A bed of nails tester is a traditional electronic test fixture used for in-circuit testing.It has pins inserted into holes in an epoxy phenolic glass cloth laminated sheet (G-10) which are aligned using tooling pins to make contact with test points on a printed circuit board and are also connected to a measuring unit by wires.

  9. Cache performance measurement and metric - Wikipedia

    en.wikipedia.org/wiki/Cache_performance...

    It provides a measure of the performance of the memory systems and hierarchies. It refers to the average time it takes to perform a memory access. It is the addition of the execution time for the memory instructions and the memory stall cycles.