Nas523 Rivet Code Chart __top__ < 90% Trusted >

If you are looking at a worn rivet head on an aircraft and see a dimple or a raised "X", you might be looking at a NAS523 rivet. Clean the head with a solvent. You likely will not see the "Code" (100 or 130) on the rivet head itself; instead, you will see the manufacturer's mark. You must use the chart to reverse-engineer the strength based on the diameter and material traceability.

Because full part numbers are too long for diagrams, specific two-letter codes represent common rivet types: : Identifies a standard Nas523 Rivet Code Chart