Used on p-8 aircraft. 3b thread class right-hand 28 thread quantity per inch nut, plate, self-locking, one lug, plain, 450 f deg cadmium surface treated
3b thread class right-hand 32 thread quantity per inch nut, plate, self-locking, miniature, corner type, plain base, 450 deg f nut only has rockwell hardness of rc 46.0 cadmium surface treated