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Casing nails – have a head that is smoothly tapered, in comparison to the "stepped" head of a finish nail. When used to install casing around windows or doors, they allow the wood to be pried off later with minimal damage when repairs are needed, and without the need to dent the face of the casing in order to grab and extract the nail.
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Unlike metal nails, treenails can not be removed (without great effort) or reused. As the wood shrinks or expand the fibers create a friction that interlocks it into the mortise snugly. If a treenail breaks or fails but the wood it is fastening remains intact the remaining treenail can be cut out and replaced with a larger treenail that fits ...
Nails are still designated in penny sizes in the United States. In Canada, nails are specified by the type and length and are still manufactured to Imperial dimensions. Nail diameter is specified by gauge number (British Imperial Standard). The gauge is the same as the wire diameter used in the manufacture of the nail. [6]
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Casing may refer to an enclosing shell, tube, or surrounding material. It may also refer to: Cartridge (firearms), shell enclosing the explosive propellant in ammunition; Casing (borehole), metal tube used during the drilling of a well; Casing (molding), decorative molding surrounding door or window openings
Different railroads used different sized nails with either alpha or numerical markings. An example would be a Southern Pacific Railroad nail with the marking "01" stamped on the head of the nail. The "01" would identify the nail as being hammered into a railroad tie in the year 1901. [2] Date nails can vary in size, shape, length, material, and ...