AIA NAS380

Purpose.

The standard practices established in this document provide
means of obtaining uniformity in the preparation and maintenance of
National Aerospace Standards prepared in inch systems of units and
shall be adhered to insofar as practical. For preparation and
maintenance of metric unit documents, see NAS10000.

Classification

Document Classification. National Aerospace Standards documents
prepared in accordance with this standard practice shall be
classified as one of the following:

Part Standard. A standard which completely defines a stockable
detail or assembly with respect to generic names (Nut, Bolt, Clamp,
etc.), material, finish, size, shape and tolerance.

Standard Practice. A standard setting forth drafting convention,
symbols, practices, etc; inspection methods, procedures, or
standards; equivalent parts, processes, or standards (by means of
comparison table); or standard terminology and definitions.

Design Standard. A standard depicting standardized features of
design such as shape, controlling dimensions, tolerances, clearance
dimensions, 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 practice shall be identified by the requirement
identifying numbers derived as shown in 5.2.2, 5.3.2, and
5.4.2.