If you are working outside the Mitsubishi ecosystem, you might find that is the most comparable international standard. Many corporate "MS" (Motor Standard) documents are adapted from ISO 2768-1 (for linear/angular dimensions) and ISO 2768-2 (for geometric tolerances). Ms812021 Standard Pdf -
When your search history says "ms812021 standard pdf" but the lab requires MIL-STD-810H. 😅 ms812021 standard pdf