Optionalsize: ansiThreadSizeEnumOptionallength: numberOptionalunit: unitOfLengthEnumOptionalsizeThe thread size, such as 1/4 or #10.
OptionalunitThe unit every length the method takes or gives is in; the size names an inch thread whatever it is.
OptionallengthThe length of the screw from under its head to its tip, in unit, which sets how much of
it ASME B18.2.1 threads.
An ASME hex cap screw's thread size and length and a unit, for
engineering.mechanical.fasteners.ansi.hexBoltSizes.