Mine are sorted by wood and machine, then by length. If I were to go further than that I would have to increase my separators exponentially.
Do It Yourself
Make it, Fix it, Renovate it, Rehabilitate it - as long as you’ve done some part of it yourself, share!
Especially for gardening related or specific do-it-yourself projects, see also the Nature and Gardening community. For more creative-minded projects, see also the Creative community.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
I think you could lose your mind doing this. In my garage I have a few pots of various screws sorted by the material they’re made of.
I keep entertaining the idea of sorting them by size, for example, one pot for M8 nuts, bolts, screws, etc. just because it’s obviously easy to tell the difference between a nut and a screw, but not easy to tell the difference between an M8 nut and an M10 nut.
Most stuff just goes in the recycling though.
I tend to loosely/grossly sort them by type and size. Machine screws go in one pile, bolts in a different pile, sheet metal screws in another pile. Otherwise, I have a number of adjustable slotted cases where I just drop them in. When I need a random screw then I have a decent idea the size and type I need and I can quickly find it without additional sorting, in most cases.
Type (machine/wood/bolt) , then size (diameter of shaft), then head type (pan/flat/pancake/countersink) then pitch (for machine screws) then length.
A screw organizer is crucial. I tend to split things up between different organizers by Type first (one organizer for Wood, etc).
I have a small organizer for "around the house" screws.
Those HF organizers are the way to go. I've never seen them cheaper anywhere else. And they often have coupons for them.
HF Coupons app for Android https://www.hfqpdb.com/android-app/install.html
Get something like this
https://www.amazon.com/Thread-Checker-Standard-Wall-Mountable-Identifier/dp/B0C8ZN9HZV
Or to take up way less space, a small manual thread checker. For sure by thread is the answer to bolt/screw sorting