AIA/NAS - Aerospace Industries Association of America Inc.
适用范围
Purpose. The standard practices established in this document provide means of obtaining uniformity in the preparation andmaintenance of National Aerospace Standards prepared inthe International System of Units (SI) (Metric) and shall be adhered to insofar as practicable. For preparation and maintenance of inch unit documents see NAS380. Classification. Document Classification. National Aerospace Standards Documents prepared in accordance wilh this standard practice shall be classified as one of the following: Part Standard. A standard which completely defines astockable detail or assembly with respect to material@ finish@ size@ shape@and tolarance. Standard Practice. A standard setting forth drafting convention@ symbols@ practices. etc; inspection methods@ procedures@ or standards; equivalent parts@ processes@ or standards (by means of a comparision table); or standard terminology and definitions. Design Standard. A standard depicting standardized featuresof design such as shape@ controlling dimensions@ tolerances@ clearancedimensions@ installation methods and requirements@ engineering design considerations@ and engineering requirements for manufacturing processes. Specification. A standard which determines the technical requirements of a standard part@ or establishes the standards for work to be accomplished; in general@ describing the processes of operation@ quality of materials@ and giving information not normally contained on related standard drawings. Requirement Identifier. The requirements defined in this standard practices shall be identified by the requirement identifying numbers derived as shown in 5.2.2@ 5.3.2 and 5.4.2.