3a thread class right-hand 0.750" thread length hexagon extended washer head style 32 thread quantity per inch cadmium or zinc screw surface treated unf thread series
3a thread class right-hand 0.844" thread length flat countersunk head style 20 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 1.500" thread length fillister head style 0.070" hole diameter 18 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.670" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unjf thread series