I hadn't seen this thread before. I am a fastener hoarder. I knew it before, but really realize it now after paging through this thread.
There's some interesting hoards of fasteners here, but I think that the OP, Outlawms, is an amateur. I've bought easily a dozen collections his size at estate sales and integrated them into my stuff over the past 20 years.
A few years ago, I fancied myself as somewhat of a fabricator, and thought that I should have hardware on hand. I bought bolts, usually at estate sales and auctions. I bet I bought out 6 or 8 collections the size of Outlawms's. I brought home coffee cans, peanut butter jars, baby food jars, drawer cabinets, boxes, bins, plastic bags, milk crates of fasteners and misc. small parts. I sorted them out whenever I had time; by size, thread, length, etc. I accumulated a few tons of them. But, if I needed more than a few bolts, usually had to go down to the store and buy matching ones anyway. Did help out for that one "special" bolt that I needed at 10:00 at night. When I moved, I got disgusted at the huge quantity, and cursed a friend of mine with the entire collection of anything over 1/4" in size. But, I kept the small fasteners and miscellaneous stuff, most in Acro Mills cabinets, sorted by size into individual drawers. I had about 600 or so drawers full. I've gone with that system since, kept them sorted out, and used them. I buy larger bolts, and don't store them. In the 10 years that I was in my last house, the number of drawers crept up to about 900.
I have been in transition for the past two years; I have all my tools and stuff in storage while I built a new house and shop. I've continued to go to estate sales and buying small fasteners. I have a hard time passing up a nice Akro Mills cabinet full of fasteners. I've probably bought another 400 to 600 drawers worth, maybe even 1000. Some of the things I recall: I bought 6 64 drawer cabinets at one sale. 2 more at another. A dozen or so 20 or 30 drawer cabinets. A few boxes full of cans and bags and jars of fasteners. A couple metal cabinets. A couple of 30 compartment hinged lid boxes. Yard sale season is over, but I've still managed to get two more Akro Mills cabinets in the past month. My thought has been when I get my shop complete, I'll sort out the cabinets, keep a 1000 or so drawers of matching cabinets, sort the stuff into them and sell the rest.
I'll never use even a fraction of these that I've created. I bet I have 10 pounds of cotter pins. 2000 6-32 nuts. 20 pounds of brass machine screws. Hundreds of thumb tacks. Thousands of pop rivets. Hundreds of plastic drywall anchors. Tens of thousands of wood screws, sheet metal screws, machine screws, washers, nuts, acorn nuts, wing nuts, rubber grommets, faucet washers, wire nuts, crimps, etc, etc, etc.
I'm sick. I need to stop.........
Back to plan A: When the shop is complete, put together a set of cabinets that covers the range of stuff I use; fill those drawers with sorted stuff from all the rest of the cabinets, and get rid of the rest.
That way, I'll have a range of sizes of stuff I use, and can capitalize on the huge investment of time I've put in over the years sorting it all out. But, the key; will be to not buy any more!