Glossary - N

Narrow gauge Track with a gauge less than 4'-8½" (standard gauge). In the U.S., 3-foot and 2½-foot gauges were used. In modeling, narrow gauge is labeled first with the scales, followed by an n (for narrow), followed by the track gauge in feet (e.g. Hon3). Nickel silver A silvery colored alloy of brass used for model railroad rails. NMRA National Model Railroad Association, a worldwide organization of hobbyists who gather to exchange information and promote creative development and fellowship in model railroading. The NMRA's standards and recommended practices ensure compatibility of mechanical and electrical components from different model railroad manufacturers. NMRA gauge Flat steel standards gauge issued by the National Model Railroad Association for checking track gauges and clearances in some scales.

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