Optionalsize: isoThreadSizeEnumOptionalpitch: numberOptionalunit: unitOfLengthEnumOptionalsizeThe thread size, such as M8.
OptionalunitThe unit every length the method takes or gives is in; the size names a metric thread whatever it is.
OptionalpitchThe crest-to-crest distance in millimetres, as ISO names it: at most the size's coarse pitch, 3 for an M24. Left out, the coarse pitch.
An ISO metric thread size and, for a fine thread, its pitch, for
engineering.mechanical.threads.iso.thread.