3a thread class right-hand 0.312" thread length fillister head style 0.062" hole diameter 40 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.062" thread length flat chamfer head style 72 thread quantity per inch oxide or zinc screw surface treated unf thread series
2a thread class right-hand 0.417" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.625" thread length flat countersunk undercut head style 40 thread quantity per inch nickel screw surface treated unf thread series
2a thread class right-hand 1.750" thread length fillister head style 32 thread quantity per inch cadmium screw surface treated one drilled hole unc thread series
3a thread class right-hand 0.438" thread length fillister head style 28 thread quantity per inch cadmium screw surface treated two drilled holes unf thread series