Nas523 Rivet Code Pdf Jun 2026

The upper-right quadrant contains two critical variables: the fastener's shank diameter and the side of the aircraft structure where the manufactured head must sit.

Are you working on a (e.g., Boeing, Airbus) or a general aviation aircraft ?

The number following the prefix identifies the shape of the rivet head. This is crucial for aerodynamics and structural clearance.

Using the NAS523 system ensures that structural integrity is maintained across different aircraft components. Technicians can quickly reference guides like the NAS523 Identification Guide PDF or Solid Rivet Specifications to ensure they are using the correct alloy—such as "icebox" rivets (D and DD) which require heat treatment and freezing before installation. nas523 rivet code pdf

If you locate a copy of the standard (often hosted by aerospace training schools or manufacturers like PCC or Arconic), it will typically include:

An NAS523 code consists of a prefix followed by a series of four component quadrants arranged around a cross symbol on engineering drawings, or written out as a continuous alphanumeric string in text.

NAS523 - XX - YY

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

is a National Aerospace Standard (NAS) document published by the AIA/NAS (Aerospace Industries Association) that defines the identification markings for solid rivets.

Note: The table above acts as a brief reference; for installation, always refer to the full Solid Rivet Specifications PDF . How to Find a NAS523 Rivet Code PDF This is crucial for aerodynamics and structural clearance

Length is measured (grip length + clinch allowance). Y = number of 16ths of an inch.

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.

(Far side) to tell the technician where the manufactured head should be placed. Southwest (SW) – Hole Preparation If you locate a copy of the standard

Understanding the NAS523 Rivet Identification System In the world of aviation structural repair, precision isn't just a goal—it's a requirement. One of the most critical tools for maintaining this precision is the NAS523 Rivet Code