2a thread class right-hand 0.280" thread length pan no. 2 head style 40 thread quantity per inch navy special project passivate screw surface treated thd relief 0.070 in. dia by 0.030 in. lg unc thread series
3a thread class right-hand 0.490" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.360" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.211" thread length flat countersunk head style 56 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.316" thread length flat countersunk head style 28 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.316" thread length flat countersunk head style 28 thread quantity per inch passivate screw surface treated unjf thread series