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Term Definition
NAAMM. National Association of Architectural Metal Manufacturers.  
Nadir. The lowest point.  
NAHB. National Association of Home Builders.  
Nail Apron. A leather or fabric pouch attached to a carpenters belt to carry nails or other fasteners.  
Nail Bar. A tool which pries open or pulls out driven nails.  
Nail Couple. A pair of nails that will resist a rotating force.  
Nail Fracture. see Hammer Fracture.  
Nail Gun. A mechanical device for driving nails by compressed air.  
Nail Popping. Protrusion of the nail from gypsumboard, usually attributed to the shrinkage of or use of improperly cured wood framing.  
Nail Pull Resistance. The ability of gypsum board to resist nail head penetration as defined in ASTM C 473.  
Nail Set. A small hand tool, like a punch, used for setting finish nails slightly below the surface of the wood.  
Nail Spotter. In gypsumboard finishing, a small box-type applicator for covering dimpled nail heads with joint compound; see Ames Taping Tools.  
Nail. A stiff metal wire fastening device with a point on one end and head designed for impact on the other end.  
Nailable Concrete. Concrete, usually made with suitable lightweight aggregate, with or without the addition of sawdust, into which nails can be driven.  
Nailable Studs. Light gauge metal studs with slots that will accept nails for attachment of wall finishes.  
Nailer. 1. A wooden strip attached to a concrete, masonry, or steel deck to allow roofing materials to be mechanically fastened. 2. A wooden strip cast into a concrete member for later fastening of finishes by nailing.  
Nailing Channel. Fabricated from not lighter than 25 gauge steel so as to form slots to permit attachment of lath by means of ratchet-type annular nails, or other satisfactory attachments.  
Nailing Pattern. The arrangement, spacings, and dimensions of nails used to attach two or more structural members together.  
NAIMA. North American Insulation Manufacturers Association.  
Nameplate Plaque. A flat thin piece of metal used for the inscription of a name.  
Nano-. A prefix meaning one billionth of a part, 10-9.  
Nanogram. One billionth of a gram.  
Nanometer. One billionth of a meter.  
Nanosecond. One billionth of a second.  
Nanotechnology. The technology of measuring and manufacturing objects of microscopically small size.  
NAP. The pile on the surface of a carpet or rug.  
Napkin Dispenser. A hollow, box-like metal device installed in womens restrooms to dispense sanitary napkins and tampons.  
Naptha. Any of several volatile, flammable liquids obtained by distilling certain materials containing carbon; used as a solvent or thinner in varnish and as a fuel; petroleum naptha is also known as benzine.  
Narrow Carpet. Fabric woven 27 in. and 36 in. in width, as distinguished from broadloom.  
Narthex. A vestibule leading to the nave of a church.  

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