3a thread class right-hand 0.443" thread length flat countersunk head style 1.240" grip length 28 thread quantity per inch navy special project unf thread series
3a thread class right-hand 0.615" thread length flat countersunk head style 1.552" grip length 24 thread quantity per inch navy special project unf thread series
3a thread class right-hand 0.407" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.429" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.615" thread length flat countersunk head style 1.928" grip length 24 thread quantity per inch navy special project unf thread series