3b thread class 32 thread quantity per inch dome nut, self-locking corner, side-by-side rivet holes, floating spacer 160 ksi, 800 deg f nut is round. floating spacer has 2 holes on one side- side by side rivet holes. plate is .525 in height silver alloy nut surface treated
Used on nut, plain, round-tail rotor gear, main gearbox. 3b thread class 16 thread quantity per inch item was also known as nut, aircraft, material oxide surface treated
