Used on uh-60 helicopter. 3a thread class 0.640" thread length hexagon head style 0.141" hole diameter 4.500mm grip length 18 thread quantity per inch bolt, rh attachment-stabilator shot peen, magnetic particle inspect, serialize; end item passivate surface treated unjf thread series
2a thread class right-hand 0.163" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand flush countersunk head style 0.443" grip length 28 thread quantity per inch 95000 single pounds per square inch shear strength cadmium surface treated unjf thread series