: Corrosion Resistant Steel (CRES / Stainless Steel, used in high-temperature zones).
Inspect the head of the old rivet using NAS523 guidelines to confirm the alloy.
Because NAS523 is a proprietary industry standard maintained by the Aerospace Industries Association (AIA), the complete, official text is typically behind a paywall on technical standards platforms like GlobalSpec . nas523 pdf top
The NAS523 standard, often referred to as the is a foundational document used in the aerospace and defense industries. It provides a universal coding system that allows engineers and technicians to identify the characteristics of a fastener (type, diameter, length, material, and finish) through a standardized shorthand. 🔩 What is NAS523?
Published by the , the NAS523 standardizes the identification codes used on aircraft fasteners. When working on an aircraft skin or internal structure, you cannot simply look at a rivet and guess its alloy or strength. The NAS523 standard provides a universal "key": : Corrosion Resistant Steel (CRES / Stainless Steel,
If you are looking to secure a copy of the official standard, there are a few primary ways to access it: 1. Professional Database Services
The final quadrant determines the total length of the rivet shank, dictated in . A value of -5 indicates a rivet length of -inch, whereas a -6 stands for a Cross-Referencing with Standard Rivet Formulas The NAS523 standard, often referred to as the
: The total grip length or overall length, usually measured in 16ths of an inch. The NAS523 Quadrant System
The is the gold standard for reference because: