2a thread class right-hand 1.500" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.501" thread length flat countersunk head style 0.928" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.323" thread length flat countersunk head style 0.802" grip length 32 thread quantity per inch cadmium surface treated unjf thread series