3a thread class right-hand 0.66" thread length double hexagon head style 0.045" hole diameter 0.715" grip length 32 thread quantity per inch document MS9574b, 29APR1996; has been superseded by AS9574; all part numbers remain the same, ie..p/n MS9574-03, -04, -05 etc. silver surface treated unjf thread series
3a thread class right-hand 0.842" thread length hexagon head style 1.735" grip length 20 thread quantity per inch passivate surface treated unf thread series