NAS523 Rivet Identification Guide | PDF | Rivet | Sheet Metal
Note: The official NAS523 standard excludes some diameters like -2 or -12. Always refer to the PDF for exact availability.
The initial part of the code designates the specific standard number, which dictates the head style (countersunk or universal) and the specific design standard. Common examples include:
Indicates the rivet head style (e.g., universal, countersunk). Southwest (SW): Specifies the diameter of the rivet. nas523 rivet code pdf
Do you need the for these codes?
Engineers, mechanics, and procurement specialists use NAS523 rivet codes to determine the exact material, head style, diameter, and length of a rivet. This comprehensive guide breaks down the coding structure so you can accurately interpret any NAS523 symbol. Structure of a NAS523 Rivet Code
The information is organized into four quadrants representing different technical specifications: NW (Northwest / Upper Left): Specifies the rivet part number (typically MS or AN) and the material alloy code The letters identify an MS20470AD rivet made of 2117 aluminum alloy. NE (Northeast / Upper Right): Indicates the rivet diameter NAS523 Rivet Identification Guide | PDF | Rivet
: Denotes 2117-T alloy, characterized by a single dimple on the rivet head.
This quadrant dictates the total length of the rivet. Rivet length is measured in .
On aerospace blueprints and structural repair drawings, the NAS523 code is rarely written as a single line of text. Instead, it is displayed using a . Common examples include: Indicates the rivet head style (e
If you are working on a specific aircraft, Chapter 51 (Standard Practices - Structures) of the aircraft's SRM will always include a dedicated NAS523 translation matrix customized for that specific airframe's allowable hardware. Final Thoughts for Sheet Metal Technicians
The unit of measurement for the diameter code depends on the fastener type:
: The Aerospace Industries Association manages and sells official copies directly.