3b thread class right-hand 24 thread quantity per inch nut, self-locking, captive washer, shear type nut is heat treated to 160 ksi min iaw mil-h-6875; washer is heat treated to 140 ksi min iaw mil-h-6875 passivate surface treated
Used on a400m airbus. 3b thread class right-hand 24 thread quantity per inch nut, self-locking, captive washer surface treatment:passivated with cetyl alcohol lubricant passivate surface treated