Optionalsize: ansiThreadSizeEnumOptionalseries: ansiWasherSeriesEnumOptionalunit: unitOfLengthEnumOptionalframe: Bit.Inputs.Base.FrameOptionalsizeThe thread size, such as 1/4 or #10.
OptionalunitThe unit the fastener is made in and its lengths are read in; the size names an inch 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.
OptionalseriesWhether the washer is narrow or wide around its hole.
An ASME B18.22.1 type A plain washer for
parts.mechanical.fasteners.ansi.washerand its twin with face roles: its size, narrow or wide, the unit and where it bears.