A: Largely, yes. NAS523 is the aerospace adoption of Z1.4. However, the "top" difference is that NAS523 includes specific notes regarding fastener traceability and critical defect management that Z1.4 does not cover. If your contract calls out NAS523, do NOT substitute Z1.4.
2024 aluminum alloy (DD rivet, often called "icebox" rivets because they require heat treatment and refrigeration before use). Raised Cross: 5056 aluminum alloy (B rivet). Technical Resources & PDFs nas523 pdf top
Specifies the total length of the rivet or fastener to be used for that specific joint. Accessing the Full Text A: Largely, yes
The symbol consists of a central cross with information placed in four quadrants, often referred to by compass directions: Information Provided Upper Left Rivet part number (AN/MS) and material code Upper Right If your contract calls out NAS523, do NOT substitute Z1
: The total grip length or overall length, usually measured in 16ths of an inch. The NAS523 Quadrant System