Engineering sometimes calls for the use of the material called unattainium. In other words, at times there is just no easy way to find the balance between design requirements and reality. Other times, someone isn’t knowledgeable enough to make certain specifications, so they come up with specs that may sound right, but aren’t real. Anyone ever run into a set of parts that where designed with all the mating features being line-to-line? How many of us have searched high and low for a “black alodine” finish? Another mythical metal finish is “clear hard anodize”. I’m going to cover some of these points in future articles. For now, I’d like to see other misspecifications that people have experienced in the engineering field. Please comment about what you’ve seen.