2a thread class right-hand 0.547" thread length hexagon extended washer head style 32 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.078" thread length flat countersunk head style 56 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 1.750" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 0.252" thread length pan head style 32 thread quantity per inch navy special project cadmium screw surface treated unc thread series
3a thread class right-hand 0.366" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unjf thread series
2a thread class right-hand 0.500" thread length flat chamfer head style 20 thread quantity per inch zinc or phosphate screw surface treated unc thread series