Nas523 Rivet Code Pdf !exclusive! Info

The letters immediately following the prefix indicate the specific specification of the rivet, including its head style (universal vs. countersunk) and material composition.

The code in the top quadrant identifies the base part standard, which dictates the head style (universal head, 100-degree countersunk, etc.) and the material composition of the rivet. Common base standard prefixes include: : Universal head rivets. MS20426 : 100-degree countersunk head rivets.

Understanding the NAS523 standard guarantees that repairs match original factory specifications, keeping aircraft structurally sound and compliant with civil and military aviation authorities.

This system minimizes clutter on complex aerospace blueprints and eliminates cross-language or cross-company misinterpretations during manufacturing. Structure of the NAS523 Code nas523 rivet code pdf

Generally used for the rivet length, measured in 16ths of an inch.

: Letters like D (Dimpled), C (Countersunk), or F (Far side) tell the technician how to prepare the sheet metal substrate before driving the fastener. Linear Representation on Modern Blueprints

The official NAS523 specification is a copyrighted document published by the Aerospace Industries Association (AIA) and must be purchased from authorized distributors. The letters immediately following the prefix indicate the

Typically indicates the rivet material or alloy type.

On structural blueprints, the NAS523 code is often formatted as a cross (+). The location of the numbers and letters relative to the cross determines their meaning:

[Top Quadrant] Rivet Part Number │ [Left Quadrant] ──┼── [Right Quadrant] Rivet Diameter Countersink / Dimple Code │ [Bottom Quadrant] Max Material Thickness / Grip Length Common base standard prefixes include: : Universal head

: Purchase directly from the Aerospace Industries Association or licensed distributors like IHS Markit, SAE International, or Techstreet.

: Specifies the diameter of the rivet (usually in 1/32" increments) and indicates which side the manufactured head should be placed . N = Near side F = Far side

Specifies the fastener length in 1/16" increments. For instance, a value of "-6" would indicate a length of 3/8" (6/16"). Common Reference PDFs

: Total length and any special finish or processing codes. Why You Need the Official NAS523 PDF Document