M45938/3-2C

LOCKNUT military-standard plain clinch nut primarily used in aerospace and high-performance industrial applications. It is designed to be pressed into a pre-drilled hole in thin sheet metal, where it becomes a permanent, threaded fastener. - Thread Size: 2-56 Unified National Coarse (UNC).
Material: Constructed from Iron alloy 660 (A286 Stainless Steel).
Surface Treatment: Passivated overall for corrosion resistance.
Type: Plain (non-locking) clinch nut.
National Stock Number (NSN): 5310-01-292-5004. (sold per piece)