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  2. Trapezoidal thread form - Wikipedia

    en.wikipedia.org/wiki/Trapezoidal_thread_form

    The original trapezoidal thread form, and still probably the one most commonly encountered worldwide, with a 29° thread angle, is the Acme thread form (/ ˈ æ k m iː / AK-mee). The Acme thread was developed in 1894 as a profile well suited to power screws that has various advantages over the square thread , [ note 1 ] which had been the form ...

  3. Thread pitch gauge - Wikipedia

    en.wikipedia.org/wiki/Thread_pitch_gauge

    Three different sets of threading gauges. The uppermost gauge is an ISO metric pitch gauge, the larger gauge in the center is for measuring the Acme thread form, and the lower gauge is for Whitworth screws. 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 ...

  4. Acme thread form - Wikipedia

    en.wikipedia.org/?title=Acme_thread_form&redirect=no

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Acme_thread_form&oldid=790986025"

  5. List of thread standards - Wikipedia

    en.wikipedia.org/wiki/List_of_thread_standards

    Acme Screw Threads: Trapezoidal Thread Form: Tr 60×9 ANSI/ASME B1.9-1973 (R2017) Buttress Inch Screw Threads: Breech-Lock Thread Form: ASME B1.10M-2004 (R2014) Unified Miniature Screw Threads: V Thread Form: 0.60 UNM ANSI/ASME B1.11-1958 (R2016) Microscope Objective Thread: V Thread Form ASME B1.13M-2005 (R2015) Metric Screw Threads: M Profile ...

  6. Unified Thread Standard - Wikipedia

    en.wikipedia.org/wiki/Unified_Thread_Standard

    This Standard provides essential specifications and dimensions for the gauges used on Unified inch screw threads UN [unified] and UNR [external threads only] thread form, and covers the specifications and dimensions for the thread gauges and measuring equipment listed in Tables 1 and 2. The basic purpose and use of each gauge are also described.

  7. African hair threading - Wikipedia

    en.wikipedia.org/wiki/African_hair_threading

    There are many variations and styles in African hair threading, depending on the types and patterns as well as the shape, size, and direction of the sections of hair. [12] Some of the common styles are: Corkscrew: This style involves wrapping the thread around the hair in a spiral motion, creating long, springy sections that resemble corkscrews ...

  8. Thread angle - Wikipedia

    en.wikipedia.org/wiki/Thread_angle

    In mechanical engineering, the thread angle of a screw is the included angle between the thread flanks, measured in a plane containing the thread axis. [1] This is a defining factor for the shape of a screw thread .

  9. Center gauge - Wikipedia

    en.wikipedia.org/wiki/Center_gauge

    Two different thread setting gauges. Center gauges and fishtail gauges [1] are gauges used in lathe work for checking the angles when grinding the profiles of single-point screw-cutting tool bits and centers. In the image, the gauge on the left is called a fishtail gauge or center gauge, and the one on the right is another style of center gauge ...

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