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  2. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length (3 ⁄ 4 inch per foot or 62.5 millimeters per meter) measured by the change of diameter (of the pipe thread) over distance of thread.

  3. British Standard Pipe - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Pipe

    BSPT threads [2] These can be combined into two types of joints: Jointing threads These are pipe threads where pressure-tightness is made through the mating of two threads together. They always use a taper male thread, but can have either parallel or taper female threads. (In Europe, taper female pipe threads are not commonly used.) Longscrew ...

  4. List of thread standards - Wikipedia

    en.wikipedia.org/wiki/List_of_thread_standards

    Dryseal Pipe Threads (Inch) Pipe Thread Form ASME B1.20.7-1991 (R2013) Hose Coupling Screw Threads - Inch: Pipe Thread Form ASME B1.21M-1997 (R2013) Metric Screw Threads - MJ Profile: V Thread Form BS 84: Tables of BS Whitworth, BS Fine and BS Pipe Threads: V Thread Form (55°) 1 ⁄ 4 ″-20 BSW ISO 68-1:1998: ISO general purpose screw threads ...

  5. British Standard Whitworth - Wikipedia

    en.wikipedia.org/wiki/British_Standard_Whitworth

    From 1 ⁄ 4 in up to 1 + 12 in, thread pitch is the same in both systems except that the thread pitch for the 12 in bolt is 12 threads per inch (tpi) in BSW versus 13 tpi in the UNC. Thread form

  6. 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 ...

  7. Thread angle - Wikipedia

    en.wikipedia.org/wiki/Thread_angle

    British standard pipe thread: G 55° DIN / BS / EN / ISO 228-1 / ISO 7-1 National Pipe Thread NPT 60° ASME B1.20.-1983 Pipe Threads, General Purpose, Inch

  8. 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.

  9. AN thread - Wikipedia

    en.wikipedia.org/wiki/AN_thread

    For example, AN6 bolt has a 3 ⁄ 8-24 thread [3] whereas an -6 AN fitting has a 9 ⁄ 16-18 thread. [ 4 ] Originally parts were made compliant to the specification MIL-F-5509, but they are now controlled under SAE AS (Aerospace Standards) specifications AS4841 through AS4843 and AS4875.

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