I specialize in tons of stainless; chrome and black anodized hardware.
Interior, exterior, underhood.
I've tagged and bagged literally hundreds of various fasteners to this point.
With hundreds left to go I'm sure.
Many times, if it is a piece that is not visible on the (black) exterior, I go with Stainless.
That way, to me, I can see all the fasteners and keep a running inventory in my head of what has been replaced, and what is due for a look-see.
Interior is a little easier, as you don't have to be as mindful of exactly the grade of stainless or chroming for rust prevention.
But as previous posters have said - you need to be just a tad bit more specific.
Say - specifics like - #8 x 1"; Pan head; countersunk, with integral washer, in stainless - or black painted, that sort of thing.
There are about at least 60 or so interior fasteners I have already catalogued.
And / or - as someone has said - find yourself a top shelf Ace Hardware.
Here in my area - it is Howard Brother's - Ace Hardware.
They have hundreds of chrome and, black, and satinless fasteners.
Be sure to bring a working credit card - the smallest bag of stuff gets to be hundreds quickly.
Plus tons of other goodies I use regularly, like fiber and rubber washers, vacuum line clamps, etc etc.
Home Despot or like will have something in bulk every now and then.
HD has really shrunk their fastener selection.
I think Lowe's keeps more variety in my tastes. For more "exotic" stainless, blackened etc.
But I'm not a fan of either.
For what it is worth.