The NAS523 PDF document can be found through various sources, including:
If you are looking for an official, printable for your toolbox, workshop, or engineering office, you have a few reliable avenues:
NAS523 is a rivet code that defines the requirements for a specific type of rivet used in aerospace applications. The code outlines the material, size, and performance characteristics of the rivet, ensuring that it meets the stringent standards of the aerospace industry. The NAS523 rivet code is widely used in the manufacture of aircraft, spacecraft, and other defense systems, where failure is not an option.
The Ultimate Guide to NAS523 Rivet Codes: Understanding Aerospace Fastener Callouts 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)
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:
A typical NAS523 rivet part number looks like: The NAS523 PDF document can be found through
| 1 | 2 <- (Top Left: Rivet Code/Specification | Top Right: Material Code) _______|_______ | 3 | 4 <- (Bottom Left: Diameter & Location | Bottom Right: Max Flushness/Dimple) | 1. Top-Left Quadrant: Rivet Code / Part Number
Example: identifies an MS20470AD universal-head rivet made of 2117-T3 aluminum. Example: BB identifies an MS20426AD countersunk rivet.
"The code," she whispered. "It's a kill switch." The Ultimate Guide to NAS523 Rivet Codes: Understanding
: Companies like Boeing or Piper may use proprietary variations (e.g., BAC codes) that cross-reference with NAS523 standards .
Here’s a concise, informative piece covering the NAS523 rivet designation system — as found in aerospace engineering standards.
Instead of cluttering a drawing with long part numbers, technicians use a four-quadrant symbol to communicate four vital pieces of information at once. The Four Quadrants of NAS523
100° countersunk flush head rivets, used on external aircraft skins to reduce drag.
Because NAS standards are copyrighted by the , official, fully updated copies of the complete NAS523 standard document must technically be purchased through authorized distributors like IHS Markit, SAE International, or Techstreet.