: Represents an MS20426AD (or AN426AD ) 100° countersunk flush-head rivet.
NAS523 is a standard published by the Aerospace Industries Association (AIA) that defines a system of coded symbols for specifying fasteners on engineering drawings. Its official title is "FASTENER CODE".
It is heavily utilized in aircraft sheet metal work and repair.
Details the rivet length (usually in 16ths of an inch) . nas523 pdf
Verifying that the installed rivet matches the engineering specification. Common Applications in Aerospace NAS523 codes are frequently found in:
The of your repair (e.g., sheet metal thickness or aircraft type) Share public link
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Help you find a based on the part number.
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This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. It is heavily utilized in aircraft sheet metal
The location or type of installation (e.g., countersunk or protruding head)
When procuring NAS523 nuts, it is vital to request the . Due to the critical nature of these fasteners, counterfeit parts are a known risk in the supply chain.