I like to buy nuts and bolts by the pound at TSC sometimes. The thing that I can't understand though is why they don't have "real" 1/4" flat washers. What they sell as 1/4" flat washers are really 5/16" which is pretty sloppy on a 1/4" bolt. Also, their 5/16" flat washers are really 3/8".
I wrote to TSC last night about this, and it will be interesting to see their reply IF they reply.