Nas523 Pdf Top !!top!! Jun 2026

A: No. NAS523 is specific to fasteners (threaded and non-threaded hardware). For raw materials, refer to ASQC Z1.9 (Variables sampling). Using the wrong standard is a common NCR (Non-Conformance Report) finding.

The NAS523 system uses a divided into four quadrants (NW, NE, SW, SE) to represent comprehensive fastener data in one location. nas523 pdf top

designates an MS20470AD universal-head rivet made from 2117 aluminum alloy. NE (Northeast - Upper Right): Specifies the rivet diameter in 1/32" increments and the location of the manufactured head Head on the "Near" side. Head on the "Far" side. SW (Southwest - Lower Left): Indicates the hole preparation method required for flush installations. Countersinking. Dimple top two sheets and countersink the third. SE (Southeast - Lower Right): Specifies the fastener length in 1/16" increments. A "-6" would indicate a 3/8" rivet. Common Aircraft Rivets (Reference) Material Code Alloy Markings on Head Material Type None (Plain) 1100 Aluminum Non-structural Single Dimple 2117 Aluminum Most common structural Raised Dot 2017 Aluminum "Icebox" rivet; must be frozen Raised Double Dashes 2024 Aluminum "Icebox" rivet; high strength Raised Cross 5056 Aluminum Magnesium structures Double Dimples Nickel-Copper High temp/Firewalls Practical Installation Guidelines Diameter Rule: Use a rivet diameter at least the thickness of the thickest sheet being joined. Length Calculation: Using the wrong standard is a common NCR

Specifies the fastener length in 1/16-inch increments (e.g., "-6" represents a 3/8-inch rivet). Common Rivet Head Identifiers NE (Northeast - Upper Right): Specifies the rivet