Fastners

A screw is a metal pin with a head and tapered shafts that, because of it’s tapered shape, clamps two pieces of wood together. … Steel screws are a strong fastener, but they easily rust. This weakens the connection and stains the wood. That is why steel screws are often galvanized; ‘coated’ with a layer of zinc.

A  steel screw for fastening wood, metal, or other materials to concrete or masonry.