You might assume that different the screw heads are purely a matter of aesthetic, but they're often designed for a specific purpose. While you might be able to get away with using any old screw for ...

At iFixit, Carsten Frauenheim writes: It’s hard to keep track of all the different types of screws, fasteners, bolts, bits, and bobs that hold our lives together, from our fridges and phones to cars ...