Nas523 Rivet Code Pdf Jun 2026

: Approved alternative materials if the primary rivet is out of stock.

The official NAS523 standard is not freely distributed online and must be purchased from a standards body. nas523 rivet code pdf

This quadrant contains a letter or letter combination that designates the exact alloy composition of the rivet. Using the wrong material can lead to galvanic corrosion or structural failure. 1100 Aluminum (pure aluminum, low strength) B: 5056 Aluminum (contains magnesium) D: 2017 Aluminum (Icebox rivets, requires heat treatment) : Approved alternative materials if the primary rivet

: 100-degree countersunk head rivets used for flush surfaces to reduce aerodynamic drag. Using the wrong material can lead to galvanic

An NAS523 fastener code, like a specialized part number, contains all the instructions for selecting and installing that specific rivet. These codes use specific alpha-numeric characters, each with a precise meaning. While the full standard includes many variations, the code can be broken down into several key components:

Many NAS standards have been transferred to SAE for maintenance. SAE’s database ("SAE Standards Works") may host NAS523 as a historical document. SAE members can often download PDFs for free or at reduced cost.

| Code Segment | Meaning | Example | | :--- | :--- | :--- | | | Basic specification number | NAS523 | | XX | Nominal Diameter (in 32nds of an inch) | -10 = 10/32" = 5/16" dia. | | YY | Length (in 16ths of an inch) | -12 = 12/16" = 3/4" length |