: Aluminum Alloy (2117-T4, most common structural rivet, field-strength)
Provides load-bearing limits for each specified code during structural modifications. How to Find Official PDFs
If you're looking for a specific NAS523 PDF document, I recommend searching online or contacting aerospace industry organizations and standards bodies directly.
However, the full code printed on engineering drawings and in the follows a logical structure:
Indicates the rivet diameter (in 1/32" increments) and the manufactured head location . The letters N (Near) or F (Far) tell the technician which side of the sheet the head should be placed on.
This distinction is crucial—when decoding a rivet callout, the diameter value represents 1/32 inch increments.
While the basics are easy to memorize, the is an essential document for compliance and detail. The official document goes far beyond the basics by providing:
: Ensure that a Monel or Titanium rivet isn't accidentally replaced with a soft aluminum rivet, preventing galvanic corrosion or structural failure.
The humble rivet code is a language of safety. The is more than a table of numbers—it is a certification that the fasteners in your magnesium structure will not corrode, shear, or fail prematurely. Whether you are an A&P mechanic replacing a dozen rivets on a tailcone or an engineer designing a new UAV, having the correct NAS523 documentation is non-negotiable.
The code provides details for each quadrant without explicitly labeling the compass designations (NW, NE, SW, SE). Northwest (Upper Left) : Specifies the Part Number (e.g., AN or MS) and Material/Alloy The letters represent an MS20470AD rivet made from 2117 aluminum alloy. Northeast (Upper Right) : Specifies the Rivet Diameter and the required location of the manufactured head. : Manufactured head is on the : Manufactured head is on the Southwest (Lower Left) : Provides Dimple and Countersink instructions. means dimple the top two sheets and countersink the third. Southeast (Lower Right) : Indicates the Rivet Length , often shown in increments like -6. Reference Documents
Do you need the for specific rivet material codes (like AD, D, or DD)?
