I completed the "platform" I was working on to replace the water-damaged Ikea "plinths" that hold up some cubbyhole bookshelves in our family room. Looks nice, almost like a built-in. Almost. Maybe when I make a top to join them altogether ...
I carried the "plinths" into the garage to dispose of them. Each is an open rectangle made of four strips of veneered particle board. Each corner was fastened with one of those knock-down fastener gizmos, similar to the one shown here:
I managed to harvest 13 or 14 sets, throwing out a couple that had corroded from the water exposure. I'm not sure what I'll ever use them for, but I can't bring myself to throw out stuff like that. Depression-era parents may be to blame. The fasteners are now neatly nestled amongst a number of other items I've accumulated over the years.
I have some small gauge nails with over-wide flat heads, in three different finishes: copper, galvanized and bluish-black. They came with the house, the former owners of which were apparently unaware of the invention of the screw. I have yet to find a screw anywhere in the house.
The copper ones are presumably for flashing, and the galvanized for some other roofing need. The others might be plasterboard nails; I'm not sure. (We have walls that are pre-sheetrock and post-lath; consisting of sheetrock-ish panels with a grid of holes to help support the the coarse plaster layer) It would come as a great surprise if I ever have a need for any of those nails, but I've got them, just in case. I have smaller nails in similarly exotic materials as well.
Other house-bonus items include some very thin "pin" style nails with tiny rounded heads. These are less fasteners than they are a test of skill. It would require a better man than me to drive one into anything tougher than styrofoam.
I've also got every extra wall anchor and proprietary screw that ever came in a plastic bag with some bought item. There are a staggering number of slight permutations on screws of basically the same gauge and length. It's as if each manufacturer commissions a screw design for each product. It outs me in mind of the tupperware/glad/ziplok/generic food containers we have; seemingly identical containers all have slightly different threads designed to prevent any other lid from mating.
In addition, I've got the leftovers from every fastener I needed a few of and decided it would be a shame not to buy the box. Same goes for other small items that that come in bags. EMT connectors, copper pipe fittings, etc.
My Dad had glass jars. Jars and jars and jars of every fastener that ever crossed his path. I believe they are still in my parents' garage. Steel-cut nails, corrugated fasteners, mismatched machine screws and bolts, you name it. In the main they weren't terribly well organized though, so I'm ahead on that score.