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In woodworking and construction, a nail is a pin-shaped object of metal (or wood, called a treenail or "trunnel") which is used as a fastener, as a peg to hang something, or sometimes as a decoration.
While the frame-first technique dominates the modern ship construction industry, the ancients relied primarily on the other techniques to build their watercraft.
Rafts were made where wood was available but not large enough to carve into dugouts and they could also be made from reeds.
The earliest Egyptian boats were rafts made of papyrus; wooden boats did not replace rafts until the Gerzean/Naqada II Period. Dugouts are defined as being carved out of a single piece of wood, and they could be elaborately decorated and quite seaworthy.
A nail holds materials together by friction in the axial direction and shear strength laterally.
The point of the nail is also sometimes bent over or clinched after driving to prevent pulling out.