The base code 21076 specifies a self-locking, two-lug, floating nut plate made of corrosion-resistant steel, with reduced rivet spacing and low height. The suffix 'L3N' indicates specific characteristics: 'L' denotes reduced rivet spacing and low height, '3' specifies a #10-32 thread size, and 'N' indicates a passivated finish with dry film lubrication. MS identifies a U.S. Military Standard for aerospace/military hardware. Governed by the MS standard series, administered by Military Standards.