1.506" hole diameter 3.250" outside diameter 0.195" material thickness flatted one side, 1.590 in. from center to top of flatted side recessed both sides
Used on w/s:aircraft, hawkeye e-2c; fms-aircraft, hawkeye e-2c; aircraft, c-2a (reprocured); aircraft, f-111. 3b thread class right-hand flat countersunk head style 32 thread quantity per inch cadmium surface treated