ThreadSM

ThreadSM documents screw threads following the Stahl-Metall (SM) system often used in German heavy machinery. The model records diameter, pitch, tolerance class, and whether the thread is designated as coarse or fine. It also references relevant DIN standards, notes about thread length, and links to associated features. Capturing SM threads distinctly helps global manufacturers ensure compatibility with regional fasteners and prevents confusion with ISO metric or UN threads when reading multilingual drawings. Confidence indicators and sourcing information make it easier to prioritize review of rarely used thread forms, and the data can feed conversion tables when migrating to other standards.

Bases: Thread

Represents a screw machine (SM) 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.SM: 'SM'>]` DEFAULT: `<ThreadType.SM: 'SM'>`
`sm_size`	The size of the SM thread. TYPE: `Decimal`

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

class ThreadSM(Thread):
    """
    Represents a screw machine (SM) thread.
    """

    thread_type: Literal[ThreadType.SM] = ThreadType.SM
    sm_size: Decimal = Field(..., description="The size of the SM thread.")