2a thread class right-hand 0.351" thread length hexagon head style 24 thread quantity per inch hardness area to 1.634 in. from end of point unf thread series
2a thread class right-hand 2.750" thread length headless (setscrew) head style 24 thread quantity per inch oxide film surface treated unf thread series
3a thread class right-hand 0.760" thread length headless (setscrew) head style 32 thread quantity per inch one hole in point 0.037 in. min 0.042 in. max dia unjf thread series
Used on spec item. 3a thread class right-hand 0.428" thread length headless (setscrew) head style 32 thread quantity per inch passivate surface treated unc thread series
3a thread class right-hand 0.178" thread length headless (setscrew) head style 56 thread quantity per inch navy special project passivate surface treated unjc thread series
3a thread class right-hand 0.614" thread length headless (setscrew) head style 32 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.365" thread length headless (setscrew) head style 32 thread quantity per inch passivate surface treated unjf thread series