Reading this has taught me that there even were original brass inserts. Every sharktooth (*) drum I've had had nuts in the lugs. I always figured they were stock. They do work perfectly.

(*) Yes, sharktooth! Teardrop is a terrible name for these lugs. Hold one in your hand (off the drum) and feel the point of it. Nothing like a teardrop, is it? Lethal weapons (literally, and far more like a shark's tooth.