2a thread class right-hand 1.826" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 1.210" thread length flat chamfer head style 0.047" hole diameter 28 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 1.139" thread length flat chamfer head style 0.047" hole diameter 28 thread quantity per inch cadmium surface treated unf thread series