3a thread class right-hand 0.316" thread length flat chamfer head style 28 thread quantity per inch navy special project passivate screw surface treated unf thread series
2a thread class right-hand 0.775" thread length flat countersunk head style 20 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.500" thread length round extended washer head style 24 thread quantity per inch passivate surface treated unc thread series
Used on spec item. 2a thread class right-hand 0.583" thread length fillister head style 0.037" hole diameter 48 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.689" thread length flat countersunk head style 20 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.387" thread length flat chamfer head style 0.044" hole diameter 24 thread quantity per inch passivate surface treated unrc thread series