NAS523 is a National Aerospace Standard (NAS) that covers the specification for self-locking, counterbored, and reduced-height nuts.
These nuts are typically manufactured from high-strength materials like corrosion-resistant steel (CRES) or alloy steel. They are designed to be used in applications where a standard hex nut would be too tall or too heavy, but where vibration resistance is still mandatory. nas523 pdf
NAS stands for National Aerospace Standard. These standards are published by the Aerospace Industries Association (AIA) to ensure uniformity and safety across the aerospace supply chain. NAS523 is a National Aerospace Standard (NAS) that
Specifically, NAS523 is titled: “Fastener, Captive Washer, Non-Metallic, Assembly, Procurement Specification.” However, in practical industrial use, the standard is most famously associated with the requirements for threaded fasteners and lock washers, particularly regarding plating, lubrication, and dimensional conformity. NAS stands for National Aerospace Standard
If you possess or are required to comply with an NAS523 PDF (e.g., from an archive), here is how to handle it: