According to the 'Reader's Digest Great Encyclopedic Dictionary' published in 1969, a screw bean is a tree or shrub of the mimosa family bearing spiral pods used as fodder. It has nothing to do with a screw eye, screw jack, screw pile, screw pine, screw propeller, screw thread, or screwworm fly.
Now, go impress the others in your office or home with this knowledge.
Yes, go do it now while the inspiration is hot. I'll be here when you get back.