Used on 2320-01-494-7606. washer, flat (i nom) material black oxide steel; protective finish finish 1.9.2.3 of mil-std-171, supplementary chromate treatment to be dull black, grey or olive drab
Used on end item nsn: 3805-01-542-0473; hyex excavator. 2b thread class right-hand 16 thread quantity per inch nut, self-locking, hexagon, non-metallic locking feature, 250 deg f, unf-2b zinc surface treated
Used on 2350-01-436-0007; armored reconnaissance-airborne assault vehicle. 2b thread class right-hand 20 thread quantity per inch stainless steel 316 passivate surface treated