Many NAS standards have been transferred to SAE for maintenance. SAE’s database ("SAE Standards Works") may host NAS523 as a historical document. SAE members can often download PDFs for free or at reduced cost.
When you look at an NAS523 part number (e.g., NAS523-5-8), the code breaks down as follows: nas523 rivet code pdf
The NAS523 specification is often confused with MS20470 (Universal head) and NAS1097 (reduced countersunk head), but NAS523 has a unique alloy composition and a distinct color code system. Many NAS standards have been transferred to SAE
For professional use, follow this workflow: When you look at an NAS523 part number (e
The NAS523 standard also includes a variant for 100° reduced flush head (denoted by an additional "R" suffix). Without the full PDF table, you might install a protruding head rivet where a flush head is required for aerodynamic smoothness.
Many users looking for the "nas523 rivet code pdf" accidentally search for incorrect variations. Be aware of these synonyms: