chiodi

Chiodi are metal fasteners used to join two or more materials by being driven into them with a hammer or nail gun. They typically have a head to resist withdrawal, a cylindrical shank, and a tapered tip. They are most commonly used in woodworking and construction, but also in upholstery and carpentry where quick, reversible connections are needed.

Historically forged by hand from wrought iron, nails were mass-produced with the advent of machine forging in the 18th and 19th centuries, which improved uniformity and supply. Today most nails are manufactured from steel and offered in a range of diameters, lengths, and coatings to suit different materials and environments.

Common nails are used for framing and structural work; finishing nails have small heads and are designed to be concealed with putty; brads are slender nails used for trim and delicate joinery; box nails resemble common nails but have a thinner shank. Masonry nails are hardened for use in concrete and brick.

Materials include steel (carbon steel), stainless steel, copper or bronze, and aluminum. Coatings such as galvanized zinc, phosphated finishes, or polymer coatings improve corrosion resistance. Stainless or coated nails are chosen for outdoor or damp conditions, while non-ferrous nails are preferred when staining or reaction with wood is a concern.

Nails are described by length (in inches) and gauge (thickness). Selecting the right nail depends on the material, load, and finishing requirements; longer nails for framing, shorter or finer nails for trim. Proper driving technique and, when needed, the use of a nail set, help prevent splitting.