Note : A letter "D" followed by a number indicates the number of sheets to be dimpled.
The generic format looks like this:
: Aluminum alloy 2117-T (identified by a single dimple on the head). nas523 rivet code pdf
Disclaimer: This article is for informational and educational purposes only. Always refer to the original equipment manufacturer (OEM) and current regulatory standards (FAA/EASA) for engineering data and legal compliance. Note : A letter "D" followed by a
: Should be at least three times the thickness of the thickest sheet being joined. nas523 rivet code pdf