Optionalsize: isoThreadSizeEnumOptionallength: 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.
OptionallengthThe length of the bolt from under its head to its tip, in unit, which sets how much of
it ISO 4014 threads.
An ISO hexagon bolt's thread size and length and a unit, for
engineering.mechanical.fasteners.iso.hexBoltSizes.