Where is the fastener type code located in the NAS symbol on the engineering drawing?

The fastener type code is indeed found in the northwest quadrant of the NAS (National Aerospace Standards) symbol on engineering drawings. This quadrant typically contains critical information about the fastener, including its specific type and characteristics, which are essential for ensuring the correct fastener is used in assembly and maintenance operations.

Having this information clearly defined in the northwest quadrant helps engineers and assembly mechanics quickly identify the correct specifications needed for installation or replacements, ensuring compliance with aerospace standards. This practice promotes accuracy in assembly and reduces the risk of using incorrect fasteners that may lead to structural integrity issues in aerospace applications. Understanding where to locate this information on engineering drawings is crucial for anyone involved in aerospace assembly or maintenance roles.