Used on propeller gearbox lube and scavenge pump. 3b thread class right-hand 24 thread quantity per inch nut, (alternate for AS3066-11) silver surface treated
Used on v-22 aircraft. 3b thread class right-hand 20 thread quantity per inch nut, self-locking, lightweight, castellaed, 450 degree f reference cotterpin size - 3/32" (0.09375) ; navy - nut, self-locking, aircraft cadmium surface treated