Phillips, square head, hex head, indoor, outdoor, brass, galvanized, stainless steel. No matter which one you have, you need more or different. AND THEY ARE EXPENSIVE.
I’d love to find a garage sale where they have about 500 lbs of various types of screws they will let go for 5 dollars. Perhaps some housewife who has no idea of their value.
Where do you get your fasteners? Do you get a good price on them?
-- A positive attitude will take you much further than positive thinking ever will.