scope:

PURPOSE. This specification establishes the requirements for procurement of mechanically expanded, self-plugging, blind rivets with a mechanically-locked-spindle and bulbed blind side. Blind rivets covered by this specification are for general purpose use in both thin and thick sheet applications in aerospace structures and other applications where

only one side of the assembly may be accessible.

CLASSIFICATION. Rivets covered by this specification shall be of the

following types and compositions:

TYPE I Protruding head rivets (NAS1919)

TYPE II 100 degree Flush head rivets (NAS1921)

COMPOSITION B Aluminum alloy (5056)

COMPOSITION C Corrosion resistant steel (A286)

COMPOSITION M Monel (Nickel-copper alloy)

CLASSIFICATION REQUIREMENT IDENTIFIER. The requirements defined in this

specification shall be identified by the requirement identifying numbers derived as shown below:

NAS1900-1B _______ __ | || B=COMPOSITION B | ||__________C=COMPOSITION C | | M=COMPOSITION M | | | |______|1=TYPE I | |2=TYPE 2 | |______DOCUMENT NUMBER