3a thread class right-hand 0.375" thread length fillister head style 0.031" hole diameter 48 thread quantity per inch navy special project unf thread series
2a thread class right-hand 0.200" thread length flat countersunk head style 40 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.344" thread length flat countersunk head style 48 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.298" thread length round extended washer head style 32 thread quantity per inch cadmium or zinc screw surface treated unc thread series
3a thread class right-hand 0.298" thread length round extended washer head style 32 thread quantity per inch cadmium or zinc screw surface treated unc thread series