If you locate a copy of the standard (often hosted by aerospace training schools or manufacturers like PCC or Arconic), it will typically include:
If you are looking for the formal technical document, you can often find the NAS523 Fastener Code PDF through standards organizations like or educational repositories like Scribd and Studylib . nas523 rivet code pdf
The ghost was a crack. A hairline fracture in the wing spar of a vintage F-4 Phantom, a relic being prepped for a ceremonial final flight. The maintenance logs were a mess, and the original specs were buried in a microfiche archive that had been flooded a decade ago. If you locate a copy of the standard