3a thread class right-hand 0.900" thread length flat chamfer head style 16 thread quantity per inch shank relieved under head 0.10 in. porm .010 w to 0.30 in. plus .000, minus .010 dia unc thread series
2a thread class right-hand 0.500" thread length flat countersunk head style 16 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.125" thread length flat chamfer head style 36 thread quantity per inch phosphate screw surface treated grip diameter uns thread series
2a thread class right-hand 0.203" thread length oval countersunk head style 40 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.375" thread length flat countersunk head style 16 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.340" thread length flat chamfer head style 32 thread quantity per inch zinc screw surface treated 30 deg chamfer on underside of head unc thread series
2a thread class right-hand 0.230" thread length flat countersunk head style 56 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.531" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series
