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  2. Unified Thread Standard - Wikipedia

    en.wikipedia.org/wiki/Unified_Thread_Standard

    Now, it is less common to see machine screws larger than #14, or odd number sizes other than #1, #3 and #5. Even though #14 and #16 screws are still available, they are not as common as sizes #0 through #12. [citation needed] Sometimes "special" diameter and pitch combinations (UNS) are used, for example a 0.619 in (15.7 mm) major diameter with ...

  3. List of thread standards - Wikipedia

    en.wikipedia.org/wiki/List_of_thread_standards

    Microscope Objective Thread: V Thread Form ASME B1.13M-2005 (R2015) Metric Screw Threads: M Profile: V Thread Form ASME B1.15-1995 (R2003) Unified Inch Screw Threads (UNJ Thread Form) V Thread Form ASME B1.20.1-2013: Pipe Threads, General Purpose (Inch) Pipe Thread Form ANSI B1.20.3-1976 (R2013) Dryseal Pipe Threads (Inch) Pipe Thread Form ASME ...

  4. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Example (inch, coarse): For size 7 ⁄ 16 (this is the diameter of the intended screw in fraction form)-14 (this is the number of threads per inch; 14 is considered coarse), 0.437 in × 0.85 = 0.371 in. Therefore, a size 7 ⁄ 16 screw (7 ⁄ 16 ≈ 0.437) with 14 threads per inch (coarse) needs a tap drill with a diameter of about 0.371 inches.

  5. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    Download as PDF; Printable version; ... Outside North America, some US pipe thread sizes are widely used, ... 14.684 1 ⁄ 2: 14 0.07142857 1.8143 ...

  6. JIC fitting - Wikipedia

    en.wikipedia.org/wiki/JIC_fitting

    The only difference is Komatsu uses millimeter thread sizes while JIS use a BSP (British Standard Pipe) thread. ... 1-1/16” - 12 UN: 0.130 ... 0.664 13----- 14: 0 ...

  7. Screw thread - Wikipedia

    en.wikipedia.org/wiki/Screw_thread

    It is defined in ANSI/ASME B1.1 Unified Inch Screw Threads, (UN and UNR Thread Form). In some cases products are still made according to the old American National Standard Series, which has slightly different specifications, and has been technically obsolete since 1949.

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  9. British Standard Whitworth - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Whitworth

    The Unified thread angle is 60° and has flattened crests (Whitworth crests are rounded). From 1 ⁄ 4 in up to 1 + 1 ⁄ 2 in, thread pitch is the same in both systems except that the thread pitch for the 1 ⁄ 2 in bolt is 12 threads per inch (tpi) in BSW versus 13 tpi in the UNC.