Detailed NAS523 documentation and identification charts can be found on several technical hosting platforms: NAS523 Rivet Identification Guide (Scribd)
For professional use, follow this workflow: nas523 rivet code pdf
in 1/16" increments. A rivet with a 3/8" length would be marked as Key Reference Documents One of the most critical elements of this
In aviation maintenance and aerospace manufacturing, precision is a legal and structural requirement. Among the various hardware standards used to secure an aircraft's skin and frame, the National Aerospace Standard (NAS) system is universally recognized. One of the most critical elements of this system is the (frequently referred to as the "rivet code" or "identification code"). nas523 rivet code pdf
The final number indicates the length of the rivet shank, measured in . -4 = 4/16" (or 1/4") length -6 = 6/16" (or 3/8") length -8 = 8/16" (or 1/2") length The NAS523 Rivet Symbol on Blueprints