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  2. Knockout punch - Wikipedia

    en.wikipedia.org/wiki/Knockout_punch

    Chassis punches: assorted sizes round and square Chassis punches: assorted sizes round and square disassembled. In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw.

  3. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Schematic of a machine tap. Below is a comprehensive drill and tap size chart for all drills and taps, imperial and metric, up to 36.5 millimetres (1.44 in) in diameter.. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.

  4. Comb binding - Wikipedia

    en.wikipedia.org/wiki/Comb_binding

    To bind a document, the user first punches holes in the paper with a specialized hole punch. Pages must be punched a few at a time with most of these machines. If hard covers are desired, they must be punched as well. In bulk applications, a paper drilling machine may be used. Then the user chooses a spine size that will match the document.

  5. Engineering tolerance - Wikipedia

    en.wikipedia.org/wiki/Engineering_tolerance

    The standard (size) tolerances are divided into two categories: hole and shaft. They are labelled with a letter (capitals for holes and lowercase for shafts) and a number. For example: H7 (hole, tapped hole, or nut) and h7 (shaft or bolt). H7/h6 is a very common standard tolerance which gives a tight fit.

  6. Stripboard - Wikipedia

    en.wikipedia.org/wiki/Stripboard

    Stripboard is the generic name for a widely used type of electronics prototyping material for circuit boards characterized by a pre-formed 0.1 inches (2.54 mm) regular (rectangular) grid of holes, with wide parallel strips of copper cladding running in one direction all the way along one side of an insulating bonded paper board.

  7. California company recalls over 540,000 tires due to lack of ...

    www.aol.com/california-company-recalls-over-540...

    The company then had to run the tires against the American standard using sample sizes. By October, the company received final test results showing the sample sizes failed the American test.

  8. Idaho's 'abortion trafficking' law partly cleared by court ...

    www.aol.com/idahos-abortion-trafficking-law...

    Idaho can enforce a first-of-its-kind "abortion trafficking" law against those who harbor or transport a minor to get an abortion out of state without parental consent, a federal appeals court ...

  9. Pilot hole - Wikipedia

    en.wikipedia.org/wiki/Pilot_hole

    In construction, a pilot hole is a small hole drilled into a piece of construction material. Its purpose may be: to guide a larger drill to the appropriate location and ease the job of the larger drill, allow the insertion of another hole-making tool, such as a knockout punch, that will produce the final-sized hole, or