The Complete Guide to the NAS523 Rivet Code PDF: Decoding Aerospace Fastener Standards

BJ

Example: identifies a standard MS20470AD (universal head) rivet made from 2117 aluminum alloy.

NE (Northeast - Upper Right):

Indicates the rivet diameter (in 1/32" increments) and the manufactured head location . The letters N (Near) or F (Far) tell the technician which side of the sheet the head should be placed on.

Because NAS standards are managed by the Aerospace Industries Association (AIA), they are copyright-protected documents. You generally cannot legally download a free "official" copy from a random file-hosting site. Here is how to get it:

  • BJ

    In the NW quadrant, letter codes represent specific military standard (MS) or National Aerospace Standard (NAS) fasteners: : MS20470AD (Universal head, 2117 aluminum alloy).

    It wasn't a spec sheet. It was a flowchart. A decision tree with boxes labeled not with engineering terms, but with single digits: 1, 4, 7, 9.

    Practical Application: Using the NAS523 Rivet Code PDF in Maintenance

    • PLAY NOW
    Legend splash

    Nas523 Rivet Code Pdf !!top!! -

    The Complete Guide to the NAS523 Rivet Code PDF: Decoding Aerospace Fastener Standards

    BJ

    Example: identifies a standard MS20470AD (universal head) rivet made from 2117 aluminum alloy.

    NE (Northeast - Upper Right):

    Indicates the rivet diameter (in 1/32" increments) and the manufactured head location . The letters N (Near) or F (Far) tell the technician which side of the sheet the head should be placed on. nas523 rivet code pdf

    • 20470: Universal Head (Protruding head). The most common general-purpose rivet.
    • 20426: 100° Countersunk Head. Used for flush surfaces to reduce drag.
    • 20427: 82° Countersunk Head (less common in modern aviation).

    Because NAS standards are managed by the Aerospace Industries Association (AIA), they are copyright-protected documents. You generally cannot legally download a free "official" copy from a random file-hosting site. Here is how to get it: The Complete Guide to the NAS523 Rivet Code

  • BJ

    In the NW quadrant, letter codes represent specific military standard (MS) or National Aerospace Standard (NAS) fasteners: : MS20470AD (Universal head, 2117 aluminum alloy). 20470: Universal Head (Protruding head)

    It wasn't a spec sheet. It was a flowchart. A decision tree with boxes labeled not with engineering terms, but with single digits: 1, 4, 7, 9.

    Practical Application: Using the NAS523 Rivet Code PDF in Maintenance