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  2. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    The sealants, where used, are typically thread seal tape thread sealant or a thread seal paste pipe dope (sometimes similar in composition to plumber's putty). Because the thread body is tapered (0.75 in/ft or 62.5 mm/m), a larger diameter keeps compressing into a smaller diameter and finally forms a seal (no clearance remains between the ...

  3. Thread angle - Wikipedia

    en.wikipedia.org/wiki/Thread_angle

    National Pipe Thread NPT 60° ASME B1.20.-1983 Pipe Threads, General Purpose, Inch Knuckle thread [2] [3] [4] Round thread; Rd 30° [5] DIN 405 / DIN 20400 Acme ...

  4. List of thread standards - Wikipedia

    en.wikipedia.org/wiki/List_of_thread_standards

    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: 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 ...

  5. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    depth, deep, down: Defines the depth of a feature. ⌀ [2] diameter: Diameter of a circle. In a feature control frame , the ⌀ symbol tells you that the tolerance zone for the geometric tolerance is cylindrical. Abbreviations for "diameter" include ⌀, DIA, and D. D: diameter; delta: Abbreviations for "diameter" include ⌀, DIA, and D.

  6. 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.

  7. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Many thread sizes have several possible tap drills, because they yield threads of varying thread depth between 50% and 100%. Usually thread depths of 60% to 75% are desired. People frequently use a chart such as this to determine the proper tap drill for a certain thread size or the proper tap for an existing hole.

  8. Talk:National pipe thread - Wikipedia

    en.wikipedia.org/wiki/Talk:National_pipe_thread

    The key standard is ANSI/ASME B1.20.1 "Pipe Threads, General Purpose (Inch)". Table 2 of that reference calls for 3 threads of make-up from hand-tight for pipes 2" and under (nominal), and 2 threads for pipes with nominal sizes over 2 inches. --WaldorfSalad 19:40, 31 July 2006 (UTC)

  9. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

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