3a thread class right-hand 0.570" thread length fillister countersunk head style 0.553" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 0.188" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.363" thread length flat countersunk head style 1.115" grip length 32 thread quantity per inch cadmium surface treated unjf thread series