Used on EA6B. 3a thread class right-hand 0.735" thread length flat countersunk head style 1.1210 mils grip length 28 thread quantity per inch unjf thread series
Used on b1-b aircraft. 3a thread class right-hand 0.403" thread length oval countersunk head style 0.312" grip length 28 thread quantity per inch bolt, 100 deg reduced head, domed close tolerance unjf thread series
3a thread class right-hand 0.397" thread length flat countersunk head style 2.875" grip length 28 thread quantity per inch passivate surface treated unjf thread series
Used on c-5 aircraft. 3a thread class right-hand 0.276" thread length fillister head style 32 thread quantity per inch mortorq, spiral drive, screw machine-flat fillister head, close tol. short thread unjf thread series
