How did you arrive at that information? I have not seen that type of information tied into the part number so you must have better information than I can find.
The nut that is called out for that stud is 02176-50100. Searching Google for that part number returns multiple results that include the thread size, M10x1.25.
Example-
The bolt for one hole of the starter is 01133-51030 . Searching Google for that part number returns multiple results that include the thread size and length, M10x1.25 x 30mm.
Example-
The stud's part number is 01517-71030. I used Messick's picture of the stud next to a ruler and drew parallel lines from the ruler at the start and end of the threads and came up with 42mm.
New info since I posted. 01517-71030 replaced 01517-51030.
01517-51030 search results show that it's M10x1.25x41mm so I was 1mm off.