2a thread class right-hand 0.556" thread length flat countersunk head style 64 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 0.500" thread length flat countersunk head style 80 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.251" grip length 32 thread quantity per inch 108000 single pounds per square inch shear strength cadmium surface treated unjf thread series
3a thread class right-hand 0.313" grip length 32 thread quantity per inch 108000 single pounds per square inch shear strength cadmium surface treated unjf thread series
3a thread class right-hand 0.444" thread length dished hexagon head style 3.552" grip length 24 thread quantity per inch cadmium surface treated unjf thread series