NAS 523 does not exist in a vacuum. The AIA has developed a comprehensive ecosystem of standards. The Fastener Code actively references other crucial documents that define the exact properties of the parts it helps identify. These include standards for specific bolts like and other dimensions defined in NAS 1080 , and various series of standards like NAS 1414-1422 and NAS 1424-1432 . This web of standards ensures that a code on a drawing points to a fastener with known, qualified properties.
: Specifies the diameter of the rivet (measured in increments of 1/32 of an inch) and the orientation of the manufactured head. The letters "N" (Near) or "F" (Far) indicate which side of the sheet the head should be placed. nas523 pdf top
The standard is widely adopted by major aircraft manufacturers to ensure consistency in structural repairs and new builds. Permanent Deformation: NAS 523 does not exist in a vacuum
The tells the technician exactly how to treat the structural sheets prior to riveting to achieve a flush fit. This is critical for maintaining aerodynamic profiles and structural load transfer. These include standards for specific bolts like and