The is a standardized symbolic system used in the aerospace industry to provide detailed instructions for rivet installation on engineering drawings. Instead of listing each detail separately, a "crosshair" symbol is used, with each of its four quadrants representing specific metrics for the fastener. The NAS523 "Cross" Symbol System
Lists special instructions , such as whether to dimple (D) or countersink (C) the metal sheets.
Do you need the for these codes?
: Official standard practice documentation for permanent deformation fasteners. specific alloy code list (e.g., what "BJ" or "CX" stands for) or a guide on how to calculate proper rivet length for your specific sheet metal thickness? NAS523 Rivet Identification Guide | PDF - Scribd
They offer a preview of the NAS523 standard. nas523 rivet code pdf
The head is on the side of the metal closest to the person reading the drawing. F (Far Side): The head is on the opposite side. 3. Southwest (SW): Hole Preparation
The right quadrant designates the length of the rivet shank, which corresponds to the total material thickness (grip) it can successfully fasten. This value is typically expressed in . The is a standardized symbolic system used in
The is a standardized symbolic system used on aviation engineering drawings to specify exact rivet types, dimensions, and installation requirements. Instead of listing details in text, a "crosshair" symbol is used, with each of the four quadrants (named like a compass) containing specific information: Quadrant Breakdown
stands for National Aerospace Standard . NAS523 is the specific standard that dictates the "Code for Rivets and Their Installation." Do you need the for these codes