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  2. Unified Thread Standard - Wikipedia

    en.wikipedia.org/wiki/Unified_Thread_Standard

    The standard designation for a UTS thread is a number indicating the nominal (major) diameter of the thread, followed by the pitch measured in threads per inch.For diameters smaller than ⁠ 1 / 4 ⁠ inch, the diameter is indicated by an integer number defined in the standard; for all other diameters, the inch figure is given.

  3. Screw thread - Wikipedia

    en.wikipedia.org/wiki/Screw_thread

    A screw thread is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered thread. A screw thread is the essential feature of the screw as a simple machine ...

  4. Units of textile measurement - Wikipedia

    en.wikipedia.org/wiki/Units_of_textile_measurement

    Thread count, also called threadcount or threads per inch (TPI), [12] is a measure of the coarseness or fineness of fabric. It is measured by counting the number of threads contained in one square inch of fabric or one square centimetre, including both the length ( warp ) and width ( weft ) threads.

  5. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    National pipe taper fuel (NPTF) National Pipe Taper Fuel ( NPTF, also called Dryseal American National Standard Taper Pipe Thread, defined by ASME B1.20.3) is designed to provide a more leak-free seal without the use of PTFE tape (often referred to by the popular brand name "Teflon") or another sealant compound.

  6. Thread pitch gauge - Wikipedia

    en.wikipedia.org/wiki/Thread_pitch_gauge

    A thread gauge, [ 1] also known as a screw gauge[ 2] or pitch gauge, [ 3] is used to measure the pitch or lead of a screw thread . Thread pitch gauges are used as a reference tool in determining the pitch of a thread that is on a screw or in a tapped hole. This tool is not used as a precision measuring instrument, rather it allows the user to ...

  7. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    The major minus pitch technique also works for inch-based threads, but you must first calculate the pitch by converting the fraction of threads-per-inch (TPI) into a decimal. For example, a screw with a pitch of 1/20 in (20 threads per inch) has a pitch of 0.050 in and a 1 ⁄ 13 in pitch (13 threads per inch) has a pitch of 0.077 in.

  8. Twist per inch - Wikipedia

    en.wikipedia.org/wiki/Twist_per_inch

    The number of twists per inch can, in plied yarns, be determined by counting the number of bumps in one inch, and dividing that number by the number of singles (the strands plied together to make the yarn). [ 2] If the adjacent picture, for example, was of an inch of two ply yarn, then the number of twists per inch would be 6 divided by 2, or ...

  9. United States Standard thread - Wikipedia

    en.wikipedia.org/wiki/United_States_Standard_thread

    United States Standard thread. United States Standard thread ( USS thread ), also known as Sellers Standard thread, [ 1] Franklin Institute thread[ 1] and American Standard thread, [ 2] is a standard for inch based threaded fasteners and washers. [ 3] The USS standard is no longer supported. It, together with the SAE fastener standard, was ...

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