In woodworking and construction, a nail is a pin-shaped, sharp object of hard metal or alloy used as a fastener. Historically made of wrought iron, today's nails are typically formed from steel, often dipped or coated to prevent corrosion in harsh conditions or improve adhesion. Ordinary nails for wood are usually of a soft, low-carbon or "mild" steel (about 0.1% carbon, the rest iron and perhaps a trace of silicon or manganese). Nails for concrete are harder, with 0.5-0.75% carbon.
 Nails as an aid to dating historic structures
 External links
- "Adhesion of Nails, Spikes and Screws in Various Woods, Experiments on the Resistance of Cut Nails, Wire Nails (Steel), Spikes, Wood Screws, Lag Screws." In Report of the Tests of Metals and Other Materials for the Industrial Purposes Made with U.S. Testing Machine at Waterton Arsenal, Massachusetts, 1884, pp.448-471. Government Printing Office, Washington, D.C.
- David Moyer, Nails for Historical Archaeologists.
- T. Scott Kreilick, The Ubiquitous Nail: an Annotated Bibliography.
- Lee H. Nelson, Nail chronology as an aid to dating old buildings, American Association for State and Local History, 1968.