I dunno, but I find real assemble-it-yourself furniture to pretty much fit that description anyway. I wanted some replacement shelf supports for a bookcase, an

I dunno, but I find real assemble-it-yourself furniture to pretty much fit that description anyway. I wanted some replacement shelf supports for a bookcase, and it turned out there are ones that are specified in metric dimensions and ones that are not, and they are like half a mm different, and so the only ones that the local big box store carried were just enough off they didn't work. Even with a hammer. And my drill wouldn't fit in the corner. So I ended up taking the appropriate drill bit and enlarging the holes by twisting it in my fingers, which hurt a bit but shockingly worked as it was a truly tiny bit of additional clearance needed and soft particle board. It really was annoying in a rather similar manner as programming can be. The fasteners and tools to make cheap furniture should be standardized.