Provides load-bearing limits for each specified code during structural modifications. How to Find Official PDFs
Confirms whether a flush head rivet requires a 100-degree or 82-degree countersink tool.
The standard, managed by the Aerospace Industries Association (AIA), establishes a universal part-numbering system and symbols for solid rivets used in aerospace structures.
: Mapping military standards (MS) and National Aerospace Standards (NAS) to company-specific part numbers (e.g., BACR codes for Boeing). nas523 rivet code pdf
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Understanding NAS523 Rivet Codes: A Complete Aerospace Fastener Guide
: It contains a letter code for the rivet's basic type, material, and alloy. For example, the code "BJ" specifies a 2117-T3 universal head rivet (MS20470AD), while "BB" indicates a 2117-T3 countersunk head rivet (MS20426AD). Provides load-bearing limits for each specified code during
: Specifies the diameter of the rivet (usually in 1/32" increments) and indicates which side the manufactured head should be placed . N = Near side F = Far side
7050 Aluminum Alloy (High strength; features a raised cross).
The NAS523 code system offers several advantages for aerospace design and manufacturing: : Mapping military standards (MS) and National Aerospace
If your is Rev 5, but the aircraft maintenance manual (AMM) references Rev 9, your installation may be non-compliant with 14 CFR Part 43 (maintenance rules).
Unlike common aluminum rivets (e.g., NAS523's aluminum counterpart, NAS523-XX, though rare), the steel version is found in engine nacelles, wing attachment points, and supersonic aircraft skins. The "code" in "rivet code" refers to the alphanumeric shorthand used on engineering drawings and bill of materials (BOM) to denote exact dimensions, material condition, and coating.
She didn't report it. Not yet. Instead, she walked to the supply cage. The old master sergeant there, a man named Crockett who had ears like radar dishes, saw the printout in her hand.
Before standardization, different manufacturers used their own cryptic systems for marking rivet locations on blueprints. The introduced NAS523 to solve this, creating a standardized symbol that acts like a GPS for sheet metal technicians. The "Crosshair" Symbol