3a thread class right-hand 0.300" thread length flat countersunk head style 32 thread quantity per inch hole in shank 0.100 in. from end to center of hole; hole min. 0.065 in. max. 0.072 in. unjf thread series
2a thread class right-hand 0.360" thread length knurled no. 2 head style 20 thread quantity per inch navy special project passivate surface treated unc thread series
Used on aircraft, hornet f/a-18. 3a thread class right-hand 0.312" thread length flat chamfer head style 32 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.281" thread length hexagon head style 28 thread quantity per inch supply with lock washer, flat washer passivate surface treated unf thread series
Used on m60a3 tank tts. 2a thread class right-hand 0.208" thread length pan head style 40 thread quantity per inch thd relieved to 0.0925 in. min dia to 0.1120 in. max dia from bearing surface of head for 1/3 of lg towards screw point passivate surface treated unc thread series
