Used on v2 aircraft. 3b thread class right-hand 32 thread quantity per inch nut, self-locking, plate-corner, counterbored, floating, 125 ksi ftu, 450 degrees
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