NAS523 Rivet Identification Guide | PDF | Rivet | Sheet Metal
The use of NAS523 rivet code offers several benefits, including:
This section specifies the nominal diameter of the rivet, usually measured in 32nds of an inch. It may also include a letter suffix indicating which side of the structure the manufactured head should be placed (e.g., "F" for Far Side, "N" for Near Side).
Specifies the rivet diameter in
Raised teat in the center. Requires heat treatment ("icebox rivets") to soften before driving.
The NAS523 rivet code is more than just a numbering system—it is the language of aerospace structural integrity. Whether you are a mechanic looking to replace a fastener or an engineer designing a spar, understanding how to decipher the codes (and having the NAS523 PDF handy for verification) is a non-negotiable skill.
For professional use, follow this workflow: nas523 rivet code pdf
The NAS523 PDF document can be found through various sources, including:
The rivet length should be chosen so that the shank protrudes through the materials roughly times the rivet diameter before being driven.
A breakdown of and how they alter the length codes. NAS523 Rivet Identification Guide | PDF | Rivet
Dimple in the center of the head. This is the most common structural rivet; it does not require heat treatment before driving.
One of the most searched sections of the is the color identification chart. For quick visual inspection on an aircraft assembly line, mechanics identify rivets by the anodized color of the head.
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