2a thread class right-hand 0.485" thread length round head style 32 thread quantity per inch navy special project painted area black color 37038 fed std 595 unc thread series
3a thread class right-hand 0.438" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.740" thread length flat chamfer head style 0.046" hole diameter 32 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.495" thread length flat chamfer head style 0.046" hole diameter 36 thread quantity per inch cadmium surface treated unf thread series