Nas523 Rivet Code Pdf =link= Jun 2026

The symbol consists of a central locating point (the cross) divided into four quadrants: .

This quadrant uses a two-letter code to represent the industry specification (like Military Standards (MS) or National Aerospace Standards (NAS) ) and the material alloy. BJ: MS20470AD (Universal head, 2117 aluminum). BB: MS20426AD (100° Countersunk head, 2117 aluminum). 2. Northeast (NE): Diameter & Head Side nas523 rivet code pdf

For a complete list of material codes and head styles, technicians typically refer to the full NAS-523 Standard PDF or specialized guides like those found on Scribd and Studylib . Unit of Measurement Example Code Length Hole Prep D (Dimple), C (Countersink) The symbol consists of a central locating point

If you used a standard rivet from the shelf, the wing would hold for 100 hours. If you used the correct coded rivet—7-4—it would hold for 10,000. The "code" was the map. 7 meant "Armstrong alloy, heat-treated to spec T-74." 4 meant "reverse countersink, 100-degree seating." BB: MS20426AD (100° Countersunk head, 2117 aluminum)

Generally used for the rivet length, measured in 16ths of an inch.