3a thread class right-hand 0.781" thread length bevel-conical head style 0.055" hole diameter 24 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.425" thread length flat countersunk head style 0.428" grip length 28 thread quantity per inch navy special project unjf thread series
3a thread class right-hand 0.964" thread length flat countersunk head style 56 thread quantity per inch navy special project cadmium screw surface treated unc thread series