To help you find the exact fastener specs or torque values you need:
A: In user search intent, "top" usually means "top revision" (latest version) or "top quality scan" (clear, text-searchable, complete tables). It rarely refers to a literal "top page" of the PDF.
Indicates the fastener's basic part number (e.g., AN or MS) and its material composition. For example, the code "BJ" identifies an MS20470AD universal-head rivet made of 2117-T3 aluminum alloy.
Specifies the part number (e.g., AN or MS) and material. For example, "BJ" often identifies a standard MS20470AD universal-head rivet made of 2117-T3 aluminum.
NW (Northwest) | NE (Northeast) Part Number & Material | Diameter & Head Placement -------------------------+------------------------- SW (Southwest) | SE (Southeast) Dimple/Countersink Data | Fastener Length Code How to Read the Four Quadrants
Indicates the rivet diameter and the location of the manufactured head . Letters like "N" (Near) or "F" (Far) specify which side of the sheet the head should be on.
: Specifies the shank diameter, calculated uniformly in 1/32-inch increments . A value of 4 indicates a 4/32” (1/8”) diameter. This quadrant also houses the letters N (Near Side) or F (Far Side) to inform the technician which side of the sheet metal receives the manufactured head.
The code covers various rivets, including standard AN426 (100° head) and 1097 smaller head rivets. Where to Find and Download NAS523
The identifies the governing specification of the fastener (such as an AN or MS standard number) and the specific alloy composition.
The standard is widely adopted by major aircraft manufacturers to ensure consistency in structural repairs and new builds. Permanent Deformation:
3. Southwest Quadrant (SW): Sheet Metal Preparation (Dimpling vs. Countersinking)
Understanding the NAS523 Rivet Code: The Ultimate Guide to Aerospace Fastener Symbols
: Dimple the top two sheets and machine countersink the third sheet. 4. Bottom-Right (SE): Fastener Length
I can pull up specific or recommend standardized FAA manuals that will help you tackle your next structural repair with confidence! NAS523 Rivet Identification Guide | PDF - Scribd
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To help you find the exact fastener specs or torque values you need:
A: In user search intent, "top" usually means "top revision" (latest version) or "top quality scan" (clear, text-searchable, complete tables). It rarely refers to a literal "top page" of the PDF.
Indicates the fastener's basic part number (e.g., AN or MS) and its material composition. For example, the code "BJ" identifies an MS20470AD universal-head rivet made of 2117-T3 aluminum alloy.
Specifies the part number (e.g., AN or MS) and material. For example, "BJ" often identifies a standard MS20470AD universal-head rivet made of 2117-T3 aluminum. nas523 pdf top
NW (Northwest) | NE (Northeast) Part Number & Material | Diameter & Head Placement -------------------------+------------------------- SW (Southwest) | SE (Southeast) Dimple/Countersink Data | Fastener Length Code How to Read the Four Quadrants
Indicates the rivet diameter and the location of the manufactured head . Letters like "N" (Near) or "F" (Far) specify which side of the sheet the head should be on.
: Specifies the shank diameter, calculated uniformly in 1/32-inch increments . A value of 4 indicates a 4/32” (1/8”) diameter. This quadrant also houses the letters N (Near Side) or F (Far Side) to inform the technician which side of the sheet metal receives the manufactured head. To help you find the exact fastener specs
The code covers various rivets, including standard AN426 (100° head) and 1097 smaller head rivets. Where to Find and Download NAS523
The identifies the governing specification of the fastener (such as an AN or MS standard number) and the specific alloy composition.
The standard is widely adopted by major aircraft manufacturers to ensure consistency in structural repairs and new builds. Permanent Deformation: For example, the code "BJ" identifies an MS20470AD
3. Southwest Quadrant (SW): Sheet Metal Preparation (Dimpling vs. Countersinking)
Understanding the NAS523 Rivet Code: The Ultimate Guide to Aerospace Fastener Symbols
: Dimple the top two sheets and machine countersink the third sheet. 4. Bottom-Right (SE): Fastener Length
I can pull up specific or recommend standardized FAA manuals that will help you tackle your next structural repair with confidence! NAS523 Rivet Identification Guide | PDF - Scribd