ThreadNPT

ThreadNPT captures tapered National Pipe Thread specifications used in fluid and gas systems. Alongside the shared thread attributes—label, quantity, diameter, spacing, handedness, and depth—it records the NPT size and series designations. Structuring NPT data helps ensure fittings mate properly, supports pressure testing workflows, and avoids costly leaks due to mismatched size or series. A confidence score highlights when manual review is necessary before releasing a piping assembly.

Bases: Thread

American National Standard Pipe Thread standards, often called National Pipe Thread (NPT) standards.

PARAMETER	DESCRIPTION
`reference_id`	Reference ID to identify the object. TYPE: `int`
`label`	A short description of the feature in a human-readable format. TYPE: `str`
`confidence`	Confidence in the feature extraction or interpretation. TYPE: `Confidence \| None`
`quantity`	The number of threads or instances. Must be non-negative. TYPE: `Decimal`
`diameter`	The diameter of the thread, including nominal size and tolerances. TYPE: `Size`
`spacing`	The spacing of the thread, defining the distance between thread crests. TYPE: `ThreadSpacing \| None`
`handedness`	The direction of the thread, such as LEFT or RIGHT. TYPE: `ThreadHandedness`
`depth`	The length of the threaded feature, including nominal size and tolerances. TYPE: `Depth \| None` DEFAULT: `None`
`thread_type`	TYPE: `Literal[<ThreadType.NPT: 'NPT'>]` DEFAULT: `<ThreadType.NPT: 'NPT'>`
`npt_size`	The nominal size of the NPT thread. TYPE: `str`
`npt_series`	The series designation of the NPT thread. TYPE: `str`

Source code in werk24/models/v2/models.py

class ThreadNPT(Thread):
    """American National Standard Pipe Thread standards,
    often called National Pipe Thread (NPT) standards.
    """

    thread_type: Literal[ThreadType.NPT] = ThreadType.NPT
    npt_size: str = Field(
        ...,
        description="The nominal size of the NPT thread.",
    )
    npt_series: str = Field(
        ...,
        description="The series designation of the NPT thread.",
        examples=["NPT", "NPS"],
    )