: Indicates that an engineering-approved spot weld may be substituted for the solid rivet under specific structural boundary conditions. Comprehensive NAS523 Quick-Reference Decoding Matrix
The NAS523 specification is documented in a PDF file, which provides detailed information on the standard. The PDF document includes: nas523 rivet code pdf
The information is organized into four quadrants representing different technical specifications: NW (Northwest / Upper Left): Specifies the rivet part number (typically MS or AN) and the material alloy code The letters identify an MS20470AD rivet made of 2117 aluminum alloy. NE (Northeast / Upper Right): Indicates the rivet diameter : Indicates that an engineering-approved spot weld may
An NAS523 code is typically presented as a cross-shaped symbol on blueprints, or written as a continuous alphanumeric string in parts catalogs. When written out, it usually consists of four distinct component fields: Example Code: NAS523-BJ-4-6 Use code with caution. Let’s break down each element of this standard string: 1. The Prefix (Standard Designation) NE (Northeast / Upper Right): Indicates the rivet
1. Top Quadrant: Rivet Part Number (Material and Head Style)
This quadrant provides critical instructions regarding the finish of the rivet head, particularly for flush (countersunk) rivets. It specifies the maximum allowable head protrusion or indicates whether the sheet metal should be machine-countersunk or dimpled. Common Alphanumeric NAS523 Code Strings
This comprehensive guide breaks down the NAS523 coding system, explains how to interpret the multi-character callouts, and provides a framework for finding and utilizing official documentation. What is the NAS523 Rivet Code?