I don't know. All I know is the logo on the knock-down fasteners,
which there's a picture of on the page I linked to.
Here's a picture of the things I need more of:
The smaller silver one is being used as a shelf pin; the larger brass
one connects a door to the top or bottom of the unit, and is the axis
the door turns on.
But they both look like versions of the same gadget, which may be
unrelated to what they're being used as.
For whatever it's worth, the guy at Lowe's said he had no idea what
they are, and a search of the place turned up nothing.
I may cross-post this with some hardware group to see if anyone can put
a name to the things.