ThreadWhitworth

ThreadWhitworth captures British Standard Whitworth thread specifications, including BSW, BSF, and BSP variations. The model records diameter, threads per inch, thread form angle, class, and whether the thread is parallel or tapered. It also notes sealing requirements, thread length, and references to standards such as BS 84 or ISO 228. Links to the associated feature and notes about thread use cases—steam fittings, pipework, or restoration projects—are preserved so teams working with legacy British equipment or global supplier networks can select the correct fittings, taps, and gauges with confidence. Confidence scores and language metadata support international collaboration on British-derived products, and the structured data simplifies conversions to modern standards.

Bases: Thread

Represents a Whitworth thread.

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.WHITWORTH: 'WHITWORTH'>]` DEFAULT: `<ThreadType.WHITWORTH: 'WHITWORTH'>`
`whitworth_size`	The nominal size of the Whitworth thread. TYPE: `Decimal`
`whitworth_tolerance_class`	The tolerance class for the Whitworth thread. TYPE: `str \| None` DEFAULT: `None`

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

class ThreadWhitworth(Thread):
    """
    Represents a Whitworth thread.
    """

    thread_type: Literal[ThreadType.WHITWORTH] = ThreadType.WHITWORTH
    whitworth_size: Decimal = Field(
        ...,
        description="The nominal size of the Whitworth thread.",
    )
    whitworth_tolerance_class: Optional[str] = Field(
        None,
        description="The tolerance class for the Whitworth thread.",
    )