This article provides a deep dive into the NAS523 standard, explains how to read the rivet code, and guides you on where to find—and how to interpret—the official PDF documentation.
: MS20426AD (100° Countersunk head, 2117 aluminum alloy). nas523 rivet code pdf
: "Icebox" rivets (2024-T alloy) requiring heat treatment and refrigeration before installation; identified by two raised dashes. Installation & Hole Preparation (SW Quadrant) This article provides a deep dive into the
For a complete breakdown of every specific alloy and head style code, technicians typically refer to the full NAS-523 standard document or official Rivet Identification Guides specific alloy code (like "BJ" or "AD") to decode for your current project? NAS523 Rivet Identification Guide | PDF - Scribd Installation & Hole Preparation (SW Quadrant) For a
Before NAS523, different manufacturers might have used different codes to identify similar rivets. This created chaos in the supply chain and on the maintenance hangar floor. NAS523 standardized this into a logical format that tells you everything you need to know about a fastener just by looking at its part number.
Identifies the rivet identity using a letter code (e.g., "BJ" for a standard universal head MS20470AD rivet).