2a thread class right-hand 0.256" thread length pan head style 56 thread quantity per inch navy special project passivate screw surface treated unf thread series
3a thread class right-hand 0.381" thread length flat countersunk head style 0.552" grip length 32 thread quantity per inch passivate surface treated unjf thread series
2a thread class right-hand 0.130" thread length pan head style 40 thread quantity per inch w/plastic polyamide patch in thd passivate surface treated unc thread series