: Represents an MS20470AD (or AN470AD ) universal-head rivet made from 2117-T3 aluminum alloy .
The search for is the first step toward ensuring aerospace-grade quality in your fastener assemblies. This document is more than just a few pages of drawings; it is a safety-critical specification that prevents electrical shorts, insulates against galvanic corrosion, and secures components against vibration failure.
The NAS523 code is visually represented by a cross, dividing a circle or square into four distinct quadrants (Northwest, Northeast, Southwest, Southeast). Each quadrant contains specific, coded information. 1. Northwest Quadrant (NW) - Fastener Type and Material
For technical documents and full identification charts, professionals often consult: NAS523 Rivet Identification Guide (Scribd) : A comprehensive guide on rivet types and codes. AIA NAS523 Fastener Code (Accuris) nas523 pdf
The SW quadrant specifies how the structural sheet metal must be machined to accept the fastener head, alongside instructions on head orientation. Common alphanumeric symbols found here include: NAS523 Rivet Identification Guide | PDF - Scribd
Months passed. An oversight committee formed. NAS523 was fenced into a monitored enclave. Kira served as a steward, cataloging the dataset, redacting intimate details, and negotiating permissions with families of people represented in the archive. Elias's family asked why their son's voice now lived in a drive; they wanted closure, not simulation. Kira learned to explain, as gently as her tech vocabulary allowed, that the archive was a pattern, not a person — but patterns braided with memory were not innocuous.
For flush skin applications, the SW quadrant dictates the to make the fastener sit flush with the aircraft skin. C : Countersunk hole. D : Dimpled hole. D2 : Dimple both sheets being joined. DC : Dimple the top sheet, countersink the bottom sheet. : Represents an MS20470AD (or AN470AD ) universal-head
To obtain an official, certified copy of the , you can utilize the following channels:
: Represents the MS20470AD (Universal Head, 2117 aluminum alloy).
: Broad selection criteria for aircraft fasteners including rivets and lockbolts. If you'd like, I can help you decode a specific fastener part number or provide the specific alloy markings for common aircraft rivets. NAS523 Rivet Identification Guide | PDF - Scribd The NAS523 code is visually represented by a
Contains the fastener part number (e.g., AN or MS) and a letter code for the material alloy . For example, "BJ" identifies a standard MS20470AD rivet made from 2117-T3 aluminum alloy.
This quadrant indicates the diameter of the rivet and where the manufacturer’s head is located (Near or Far). 3. Southwest Quadrant (SW) - Special Installation Methods
NAS523 BJ 4 - 6 | | | | Standard | Diameter Length Rivet (in 16ths) Code (in 32nds) 1. The Prefix (Standard)
To recap the critical points: