nuts and bolts are cheap enough, that about $5, will pretty much keep you stocked, and one won't have to worry about this "losing stuff" or moving them around
a ranger band will mostly guarantee that you won't lose hardware, if you're the type to not use loctite (for instance, storing stuff in handles); at which point you should have a hex on you to tighten as needed, or you've long since replaced with slotted bolt/screws that you can use a myriad of other tools/hacks to open.
or something :>