Used on an/tps-75 radar system. 3a thread class right-hand 0.412" thread length hexagon head style 24 thread quantity per inch bolt, modified passivate screw surface treated altered item unf thread series
3a thread class right-hand 0.308" thread length flat countersunk head style 40 thread quantity per inch 82 degree flat head screw 4-40 unc thread series
Used on spec item. 2a thread class right-hand 0.917" thread length pan head style 24 thread quantity per inch cadmium screw surface treated unc thread series