The following terms define Building and Machine Parts
- N -
newel: large post at toot of stairs.
nag: wooden peg, pin, or block, especially one inserted
into brickwork or between principal timbers of wall.
nonbearing wall: wall that supports
no weight other than its own.
nosing: rounded edge of stair tread extending beyond
riser.
notch: concave or V-shaped cut or indentation in edge
or across surface.
nozzle: tube or vent used to expel fluid with force.
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