2a thread class right-hand 0.150" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.219" thread length flat countersunk head style 32 thread quantity per inch screw, machine passivate screw surface treated unc thread series
2a thread class right-hand 0.422" thread length fillister head style 32 thread quantity per inch nylon 6/9, 6/10 or 6/12glass fiber reinforced, alternate, nylon-20 percent glass filled unf thread series
3a thread class right-hand 0.296" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjf thread series