: Indicates if the material needs specific preparation, such as dimpling or countersinking . D = Dimple C = Countersink D2 = Dimple both sheets
The symbol consists of a central locating point (the cross) divided into four quadrants: . nas523 rivet code pdf
: Contains practical instructions on marking holes and removing skins using the NAS523 system. : Indicates if the material needs specific preparation,
Contains the rivet part number (AN or MS) and material code. For example, the code nas523 rivet code pdf
Special installation or hole preparation methods (e.g., dimpling). (Dimple both sheets) Southeast (SE) Lower Right Rivet length in 1/16" increments. -6 (3/8" long) Key Identification Codes
