Abstract (Inputs.OCCT)OptionalsizeThe thread size, such as M8.
OptionalunitThe unit the fastener is made in and its lengths are read in; the size names a metric thread whatever it is.
OptionalframeWhere it sits: the origin where it bears, as under a head, the normal along its axis away from the part. Left out, the ground, facing +Y.
The size of an ISO metric fastener, the unit it is made in and where it sits, shared by the screws, nuts and washers of
parts.mechanical.fasteners.iso.