Simple things like fasteners don’t seem to be invented. It’s almost as if they’ve always been around. Like T-nuts — those hammer-in furniture nuts that also find use as 3D printable tripod mounts — someone invented those?
Sure enough, it seems that local company Sigma Tool & Machine have a lot to do with T-nut development. They’re now on Nantucket Blvd just north of me, and they used to be at 96 Crockford Blvd very close by.