Nominalmått

Nominalmått is a size designation used in engineering, construction, and trade to refer to a product’s approximate or intended size rather than its exact measurement. The term helps standardize communication, procurement, and interchangeability between manufacturers, suppliers, and customers. Nominalmått reflects the designated size class of a part, but the actual dimensions can vary within the tolerances defined by relevant standards.

In timber and carpentry, nominalmått describes the size used when the product is named or ordered (for example a board described as 40x60 mm). After processing such as planing and drying, the finished dimensions are typically smaller, and the precise width and thickness depend on the standard and grade used.

In piping and fittings, nominal dimension (nominal diameter) indicates an approximate bore or size class. It aids in selecting compatible components, but the actual outside diameter or inner bore is determined by the specific standard, material, and pressure rating.

In fasteners, metal products, and other manufactured items, nominal length or diameter is part of the product designation, while exact measurements are defined in standards and should be confirmed from the technical drawing or specification for precise fit.

Overall, nominalmått emphasizes standardization and ease of exchange between producers and buyers. For precise fabrication or assembly, however, engineers rely on actual dimensions and tolerances specified in the corresponding standards or technical drawings.