Nominal size意思

"Nominal size" is a term that can be used in various contexts, but it generally refers to the size that something is said to be or is labeled as, without regard to actual or measurable size. It's the size that is given as a standard or is used for identification purposes, rather than the size that is precisely determined through measurement.

Here are some examples of how "nominal size" might be used in different fields:

  1. Engineering and Manufacturing: The nominal size of a bolt or a hole is the size that is specified in the design or listed in the catalog, not the actual size that might be measured after manufacturing. There can be tolerances or variations in the actual size, but the nominal size is the standard by which the part is identified.

  2. Finance and Economics: The nominal value of a financial instrument (like a bond or a stock) is the face value or the value stated on the instrument, not the value that it might actually fetch in the market.

  3. Statistics: Nominal data is data that is used only for identification or classification purposes and does not have any inherent quantitative value. For example, nominal size in this context could refer to the size category (small, medium, large) of clothing, which is used for identification but not for measurement.

  4. Legal and Contracts: The nominal size or value might refer to the stated value of a contract or agreement, not the actual value that might be realized.

  5. Construction and Architecture: The nominal size of a piece of lumber or a construction material is the size that is listed in the specifications or that is used for ordering, not the actual size after accounting for factors like drying and planing.

In all these cases, the nominal size is a convenient standard for communication and identification, but it may not correspond exactly to the real or measured size.