Thanks to everyone for the answers so far. This doesn't seem to be as simple a question as I'd thought! You have given me some excellent direction to figure out where things are going wrong, though.
@TugboatEng: Yes, a perfect example of pedigree, on several levels. Our instruction was...
Some background: One of the products made by our company was designed almost 50 years ago. Needless to say, the original engineers are long gone, and downsizing over the years has eliminated almost all of those positions. One of their legacies is a stainless steel part spec that we're wondering...