Used on gas,generator,turbine ft4a-2 and engine,gas turbine ft4a-6 onboard 378 ft whec coast guard vessels. 3b thread class right-hand 18 thread quantity per inch nut has 2 places 180 degrees apart for lock-wire drilled .370 in. away from center of nut across points of nut in a diameter of .060 in.
3.370" hole diameter 4.013" outside diameter 0.046" material thickness navy special project internal keys 180.0 degrees apart offset 12 deg 16 min 22 sec from center line of external keys phosphate surface treated key
